diff --git a/backend/codegen/src/main/kotlin/net/mamoe/mirai/console/codegen/ValueSettingCodegen.kt b/backend/codegen/src/main/kotlin/net/mamoe/mirai/console/codegen/ValueSettingCodegen.kt
index b1cecf118..7382bd31b 100644
--- a/backend/codegen/src/main/kotlin/net/mamoe/mirai/console/codegen/ValueSettingCodegen.kt
+++ b/backend/codegen/src/main/kotlin/net/mamoe/mirai/console/codegen/ValueSettingCodegen.kt
@@ -22,9 +22,7 @@ object ValueSettingCodegen {
     object PrimitiveValuesCodegen : RegionCodegen("Value.kt"), DefaultInvoke {
         @JvmStatic
         fun main(args: Array<String>) = super.startIndependent()
-
-        override val defaultInvokeArgs: List<KtType>
-            get() = KtPrimitives + KtString
+        override val defaultInvokeArgs: List<KtType> = KtPrimitives + KtString
 
         override fun StringBuilder.apply(ktType: KtType) {
             @Suppress("ClassName")
@@ -42,7 +40,6 @@ object ValueSettingCodegen {
     object BuiltInSerializerConstantsPrimitivesCodegen : RegionCodegen("_Setting.value.kt"), DefaultInvoke {
         @JvmStatic
         fun main(args: Array<String>) = super.startIndependent()
-
         override val defaultInvokeArgs: List<KtType> = KtPrimitives + KtString
 
         override fun StringBuilder.apply(ktType: KtType) {
@@ -60,14 +57,12 @@ object ValueSettingCodegen {
     object PrimitiveValuesImplCodegen : RegionCodegen("_PrimitiveValueDeclarations.kt"), DefaultInvoke {
         @JvmStatic
         fun main(args: Array<String>) = super.startIndependent()
-
-        override val defaultInvokeArgs: List<KtType>
-            get() = KtPrimitives + KtString
+        override val defaultInvokeArgs: List<KtType> = KtPrimitives + KtString
 
         override fun StringBuilder.apply(ktType: KtType) {
             appendKCode(
                 """
-internal abstract class ${ktType.standardName}ValueImpl : ${ktType.standardName}Value, SerializerAwareValue<${ktType.standardName}>, KSerializer<Unit> {
+internal abstract class ${ktType.standardName}ValueImpl : ${ktType.standardName}Value, SerializerAwareValue<${ktType.standardName}>, KSerializer<Unit>, AbstractValueImpl<${ktType.standardName}> {
     constructor()
     constructor(default: ${ktType.standardName}) {
         _value = default
@@ -89,8 +84,13 @@ internal abstract class ${ktType.standardName}ValueImpl : ${ktType.standardName}
     final override val serializer: KSerializer<Unit> get() = this
     final override val descriptor: SerialDescriptor get() = BuiltInSerializerConstants.${ktType.standardName}SerializerDescriptor
     final override fun serialize(encoder: Encoder, value: Unit) = ${ktType.standardName}.serializer().serialize(encoder, this.value)
-    final override fun deserialize(decoder: Decoder) {
-        value = ${ktType.standardName}.serializer().deserialize(decoder)
+    final override fun deserialize(decoder: Decoder) = setValueBySerializer(${ktType.standardName}.serializer().deserialize(decoder))
+    override fun toString(): String = _value${if (ktType != KtString) "?.toString()" else ""} ?: "${ktType.standardName}Value.value not yet initialized."
+    override fun equals(other: Any?): Boolean = other is ${ktType.standardName}ValueImpl && other::class.java == this::class.java && other._value == this._value
+    override fun hashCode(): Int {
+        val value = _value
+        return if (value == null) 1
+        else value.hashCode() * 31
     }
 }
                 """
@@ -102,9 +102,7 @@ internal abstract class ${ktType.standardName}ValueImpl : ${ktType.standardName}
     object Setting_value_PrimitivesImplCodegen : RegionCodegen("_Setting.value.kt"), DefaultInvoke {
         @JvmStatic
         fun main(args: Array<String>) = super.startIndependent()
-
-        override val defaultInvokeArgs: List<KtType>
-            get() = KtPrimitives + KtString
+        override val defaultInvokeArgs: List<KtType> = KtPrimitives + KtString
 
         override fun StringBuilder.apply(ktType: KtType) {
             appendKCode(
@@ -127,9 +125,7 @@ internal fun Setting.${ktType.lowerCaseName}ValueImpl(): SerializerAwareValue<${
     object Setting_valueImplPrimitiveCodegen : RegionCodegen("_Setting.value.kt"), DefaultInvoke {
         @JvmStatic
         fun main(args: Array<String>) = super.startIndependent()
-
-        override val defaultInvokeArgs: List<KtType>
-            get() = KtPrimitives + KtString
+        override val defaultInvokeArgs: List<KtType> = KtPrimitives + KtString
 
         override fun StringBuilder.apply(ktType: KtType) {
             appendKCode(
diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/Setting.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/Setting.kt
index d09acd8db..5c71ceab0 100644
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/Setting.kt
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/Setting.kt
@@ -15,6 +15,7 @@ import kotlinx.serialization.*
 import kotlinx.serialization.builtins.MapSerializer
 import kotlinx.serialization.builtins.serializer
 import net.mamoe.mirai.console.setting.internal.cast
+import net.mamoe.mirai.console.setting.internal.isOdd
 import net.mamoe.mirai.console.setting.internal.valueFromKTypeImpl
 import net.mamoe.mirai.console.setting.internal.valueImpl
 import net.mamoe.mirai.utils.MiraiExperimentalAPI
@@ -22,7 +23,7 @@ import net.mamoe.yamlkt.Yaml
 import net.mamoe.yamlkt.YamlConfiguration
 import net.mamoe.yamlkt.YamlConfiguration.ListSerialization.FLOW_SEQUENCE
 import net.mamoe.yamlkt.YamlConfiguration.MapSerialization.FLOW_MAP
-import java.util.*
+import net.mamoe.yamlkt.YamlNullableDynamicSerializer
 import kotlin.internal.LowPriorityInOverloadResolution
 import kotlin.reflect.KProperty
 import kotlin.reflect.KType
@@ -39,7 +40,7 @@ abstract class Setting : SettingImpl() {
         property: KProperty<*>
     ): SerializerAwareValue<T> {
         val name = property.serialName
-        valueNodes.put(name, Node(name, this, this.serializer))
+        valueNodes.add(Node(name, this, this.serializer))
         return this
     }
 
@@ -55,29 +56,82 @@ internal val KProperty<*>.serialName: String get() = this.findAnnotation<SerialN
  */
 // TODO move to internal package.
 internal abstract class SettingImpl {
-    internal fun findNodeInstance(name: String): Node<*>? = valueNodes[name]
+    internal fun findNodeInstance(name: String): Node<*>? = valueNodes.firstOrNull { it.serialName == name }
 
-    internal class Node<T>(
+    internal data class Node<T>(
         val serialName: String,
         val value: Value<T>,
         val updaterSerializer: KSerializer<Unit>
     )
 
-    internal val valueNodes: MutableMap<String, Node<*>> = Collections.synchronizedMap(mutableMapOf())
+    internal val valueNodes: MutableList<Node<*>> = mutableListOf()
 
     internal open val updaterSerializer: KSerializer<Unit> by lazy {
-        val actual = MapSerializer(String.serializer(), String.serializer())
-
         object : KSerializer<Unit> {
-            override val descriptor: SerialDescriptor
-                get() = actual.descriptor
+            override val descriptor: SerialDescriptor get() = settingUpdaterSerializerDescriptor
 
+            @Suppress("UNCHECKED_CAST")
             override fun deserialize(decoder: Decoder) {
-                actual.deserialize(decoder)
+                val descriptor = descriptor
+                with(decoder.beginStructure(descriptor, *settingUpdaterSerializerTypeArguments)) {
+                    if (decodeSequentially()) {
+                        var index = 0
+                        repeat(decodeCollectionSize(descriptor)) {
+                            val serialName = decodeSerializableElement(descriptor, index++, String.serializer())
+                            val node = findNodeInstance(serialName)
+                            if (node == null) {
+                                decodeSerializableElement(descriptor, index++, YamlNullableDynamicSerializer)
+                            } else {
+                                decodeSerializableElement(descriptor, index++, node.updaterSerializer)
+                            }
+                        }
+                    } else {
+                        outerLoop@ while (true) {
+                            var serialName: String? = null
+                            innerLoop@ while (true) {
+                                val index = decodeElementIndex(descriptor)
+                                if (index == CompositeDecoder.READ_DONE) {
+                                    check(serialName == null) { "name must be null at this moment." }
+                                    break@outerLoop
+                                }
+
+                                if (!index.isOdd()) { // key
+                                    check(serialName == null) { "name must be null at this moment" }
+                                    serialName = decodeSerializableElement(descriptor, index, String.serializer())
+                                } else {
+                                    check(serialName != null) { "name must not be null at this moment" }
+
+                                    val node = findNodeInstance(serialName)
+                                    if (node == null) {
+                                        decodeSerializableElement(descriptor, index, YamlNullableDynamicSerializer)
+                                    } else {
+                                        decodeSerializableElement(descriptor, index, node.updaterSerializer)
+                                    }
+
+
+                                    break@innerLoop
+                                }
+                            }
+
+                        }
+                    }
+                    endStructure(descriptor)
+                }
             }
 
+            @Suppress("UNCHECKED_CAST")
             override fun serialize(encoder: Encoder, value: Unit) {
-                TODO()
+                val descriptor = descriptor
+                with(encoder.beginCollection(descriptor, valueNodes.size, *settingUpdaterSerializerTypeArguments)) {
+                    var index = 0
+
+                    // val vSerializer = settingUpdaterSerializerTypeArguments[1] as KSerializer<Any?>
+                    valueNodes.forEach { (serialName, _, valueSerializer) ->
+                        encodeSerializableElement(descriptor, index++, String.serializer(), serialName)
+                        encodeSerializableElement(descriptor, index++, valueSerializer, Unit)
+                    }
+                    endStructure(descriptor)
+                }
             }
 
         }
@@ -91,6 +145,13 @@ internal abstract class SettingImpl {
     }
 
     companion object {
+
+        private val ABSENT_STUB = Any()
+
+        private val settingUpdaterSerializerTypeArguments = arrayOf(String.serializer(), YamlNullableDynamicSerializer)
+        private val settingUpdaterSerializerDescriptor =
+            MapSerializer(settingUpdaterSerializerTypeArguments[0], settingUpdaterSerializerTypeArguments[1]).descriptor
+
         val allFlow = Yaml(
             YamlConfiguration(
                 nonStrictNullability = true,
@@ -124,7 +185,8 @@ fun Setting.value(default: Int): SerializerAwareValue<Int> = valueImpl(default)
 @LowPriorityInOverloadResolution
 @MiraiExperimentalAPI
 @OptIn(ExperimentalStdlibApi::class) // stable in 1.4
-inline fun <reified T> Setting.valueReified(default: T): SerializableValue<T> = valueFromKTypeImpl(typeOf<T>()).cast()
+inline fun <reified T> Setting.valueReified(default: T): SerializerAwareValue<T> =
+    valueFromKTypeImpl(typeOf<T>()).cast()
 
 @MiraiExperimentalAPI
-fun <T> Setting.valueFromKType(type: KType): SerializableValue<T> = valueFromKTypeImpl(type).cast()
\ No newline at end of file
+fun <T> Setting.valueFromKType(type: KType): SerializerAwareValue<T> = valueFromKTypeImpl(type).cast()
\ No newline at end of file
diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/Value.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/Value.kt
index 241cd2060..6e73d9289 100644
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/Value.kt
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/Value.kt
@@ -15,6 +15,7 @@ import kotlinx.serialization.BinaryFormat
 import kotlinx.serialization.KSerializer
 import kotlinx.serialization.StringFormat
 import net.mamoe.mirai.console.setting.internal.map
+import net.mamoe.mirai.console.setting.internal.setValueBySerializer
 import net.mamoe.mirai.utils.MiraiExperimentalAPI
 import kotlin.reflect.KProperty
 
@@ -36,17 +37,22 @@ interface Value<T> {
  * Typically returned by [Setting.value] functions.
  */
 class SerializableValue<T>(
-    delegate: Value<T>,
+    private val delegate: Value<T>,
     /**
      * The serializer used to update and dump [delegate]
      */
     override val serializer: KSerializer<Unit>
-) : Value<T> by delegate, SerializerAwareValue<T>
+) : Value<T> by delegate, SerializerAwareValue<T> {
+    override fun toString(): String = delegate.toString()
+}
 
 fun <T> Value<T>.serializableValueWith(
     serializer: KSerializer<T>
 ): SerializableValue<T> {
-    return SerializableValue(this, serializer.map(serializer = { this.value }, deserializer = { this.value = it }))
+    return SerializableValue(
+        this,
+        serializer.map(serializer = { this.value }, deserializer = { this.setValueBySerializer(it) })
+    )
 }
 
 /**
@@ -136,7 +142,6 @@ interface BooleanValue : PrimitiveValue<Boolean>
  */
 interface StringValue : PrimitiveValue<String>
 
-
 //// endregion PrimitiveValues CODEGEN ////
 
 
diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/CompositeValueImpl.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/CompositeValueImpl.kt
index 1b611fe9d..a3e666b92 100644
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/CompositeValueImpl.kt
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/CompositeValueImpl.kt
@@ -25,7 +25,7 @@ internal fun <T> Setting.createCompositeSetValueImpl(tToValue: (T) -> Value<T>):
 
 internal abstract class CompositeSetValueImpl<T>(
     tToValue: (T) -> Value<T> // should override onChanged
-) : CompositeSetValue<T> {
+) : CompositeSetValue<T>, AbstractValueImpl<Set<T>>() {
     private val internalSet: MutableSet<Value<T>> = mutableSetOf()
 
     private var _value: Set<T> = internalSet.shadowMap({ it.value }, tToValue).observable { onChanged() }
@@ -34,12 +34,30 @@ internal abstract class CompositeSetValueImpl<T>(
         get() = _value
         set(v) {
             if (_value != v) {
+                @Suppress("LocalVariableName")
+                val _value = _value as MutableSet<T>
+                _value.clear()
+                _value.addAll(v)
                 onChanged()
-                _value = v
             }
         }
 
+    override fun setValueBySerializer(value: Set<T>) {
+        val thisValue = this.value
+        if (!thisValue.tryPatch(value)) {
+            this.value = value // deep set
+        }
+    }
+
     protected abstract fun onChanged()
+    override fun toString(): String = _value.toString()
+    override fun equals(other: Any?): Boolean =
+        other is CompositeSetValueImpl<*> && other::class.java == this::class.java && other._value == this._value
+
+    override fun hashCode(): Int {
+        val value = _value
+        return value.hashCode() * 31 + super.hashCode()
+    }
 }
 
 
@@ -54,21 +72,39 @@ internal fun <T> Setting.createCompositeListValueImpl(tToValue: (T) -> Value<T>)
 
 internal abstract class CompositeListValueImpl<T>(
     tToValue: (T) -> Value<T> // should override onChanged
-) : CompositeListValue<T> {
+) : CompositeListValue<T>, AbstractValueImpl<List<T>>() {
     private val internalList: MutableList<Value<T>> = mutableListOf()
 
-    private var _value: List<T> = internalList.shadowMap({ it.value }, tToValue).observable { onChanged() }
+    private val _value: List<T> = internalList.shadowMap({ it.value }, tToValue).observable { onChanged() }
 
     override var value: List<T>
         get() = _value
         set(v) {
             if (_value != v) {
+                @Suppress("LocalVariableName")
+                val _value = _value as MutableList<T>
+                _value.clear()
+                _value.addAll(v)
                 onChanged()
-                _value = v
             }
         }
 
+    override fun setValueBySerializer(value: List<T>) {
+        val thisValue = this.value
+        if (!thisValue.tryPatch(value)) {
+            this.value = value // deep set
+        }
+    }
+
     protected abstract fun onChanged()
+    override fun toString(): String = _value.toString()
+    override fun equals(other: Any?): Boolean =
+        other is CompositeListValueImpl<*> && other::class.java == this::class.java && other._value == this._value
+
+    override fun hashCode(): Int {
+        val value = _value
+        return value.hashCode() * 31 + super.hashCode()
+    }
 }
 
 // workaround to a type inference bug
@@ -77,28 +113,85 @@ internal fun <K, V> Setting.createCompositeMapValueImpl(
     vToValue: (V) -> Value<V>
 ): CompositeMapValueImpl<K, V> {
     return object : CompositeMapValueImpl<K, V>(kToValue, vToValue) {
-        override fun onChanged() {
-            this@createCompositeMapValueImpl.onValueChanged(this)
-        }
+        override fun onChanged() = this@createCompositeMapValueImpl.onValueChanged(this)
     }
 }
 
 internal abstract class CompositeMapValueImpl<K, V>(
     kToValue: (K) -> Value<K>, // should override onChanged
     vToValue: (V) -> Value<V> // should override onChanged
-) : CompositeMapValue<K, V> {
+) : CompositeMapValue<K, V>, AbstractValueImpl<Map<K, V>>() {
     private val internalList: MutableMap<Value<K>, Value<V>> = mutableMapOf()
 
-    private var _value: Map<K, V> =
+    private var _value: MutableMap<K, V> =
         internalList.shadowMap({ it.value }, kToValue, { it.value }, vToValue).observable { onChanged() }
     override var value: Map<K, V>
         get() = _value
         set(v) {
             if (_value != v) {
+                @Suppress("LocalVariableName")
+                val _value = _value
+                _value.clear()
+                _value.putAll(v)
                 onChanged()
-                _value = v
             }
         }
 
+    override fun setValueBySerializer(value: Map<K, V>) {
+        val thisValue = this.value as MutableMap<K, V>
+        if (!thisValue.tryPatch(value)) {
+            this.value = value // deep set
+        }
+    }
+
     protected abstract fun onChanged()
+    override fun toString(): String = _value.toString()
+    override fun equals(other: Any?): Boolean =
+        other is CompositeMapValueImpl<*, *> && other::class.java == this::class.java && other._value == this._value
+
+    override fun hashCode(): Int {
+        val value = _value
+        return value.hashCode() * 31 + super.hashCode()
+    }
+}
+
+internal fun <K, V> MutableMap<K, V>.patchImpl(_new: Map<K, V>) {
+    val new = _new.toMutableMap()
+    val iterator = this.iterator()
+    for (entry in iterator) {
+        val newValue = new.remove(entry.key)
+
+        if (newValue != null) {
+            // has replacer
+            if (entry.value?.tryPatch(newValue) != true) {
+                // patch not supported, or old value is null
+                entry.setValue(newValue)
+            } // else: patched, no remove
+        } else {
+            // no replacer
+            iterator.remove()
+        }
+    }
+    putAll(new)
+}
+
+internal fun <C : MutableCollection<E>, E> C.patchImpl(_new: Collection<E>) {
+    this.retainAll(_new)
+}
+
+/**
+ * True if successfully patched
+ */
+@Suppress("UNCHECKED_CAST")
+internal fun Any.tryPatch(any: Any): Boolean = when {
+    this is MutableCollection<*> && any is Collection<*> -> {
+        (this as MutableCollection<Any?>).patchImpl(any as Collection<Any?>)
+        true
+    }
+    this is MutableMap<*, *> && any is Map<*, *> -> {
+        (this as MutableMap<Any?, Any?>).patchImpl(any as Map<Any?, Any?>)
+        true
+    }
+    this is Value<*> && any is Value<*> -> any.value?.let { otherValue -> this.value?.tryPatch(otherValue) } == true
+    else -> false
 }
\ No newline at end of file
diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/Setting.value composite impl.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/Setting.value composite impl.kt
index 4c2ecabb8..4ada0dc61 100644
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/Setting.value composite impl.kt	
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/Setting.value composite impl.kt	
@@ -13,7 +13,7 @@ package net.mamoe.mirai.console.setting.internal
 
 import kotlinx.serialization.*
 import kotlinx.serialization.builtins.*
-import net.mamoe.mirai.console.setting.SerializableValue
+import net.mamoe.mirai.console.setting.SerializerAwareValue
 import net.mamoe.mirai.console.setting.Setting
 import net.mamoe.mirai.console.setting.serializableValueWith
 import net.mamoe.mirai.console.setting.valueFromKType
@@ -22,43 +22,52 @@ import net.mamoe.yamlkt.YamlNullableDynamicSerializer
 import kotlin.reflect.KClass
 import kotlin.reflect.KType
 
+private val primitiveCollectionsImplemented by lazy {
+    false
+}
 
 @PublishedApi
 @Suppress("UnsafeCall", "SMARTCAST_IMPOSSIBLE", "UNCHECKED_CAST")
-internal fun Setting.valueFromKTypeImpl(type: KType): SerializableValue<*> {
+internal fun Setting.valueFromKTypeImpl(type: KType): SerializerAwareValue<*> {
     val classifier = type.classifier
     require(classifier is KClass<*>)
 
     if (classifier.isPrimitiveOrBuiltInSerializableValue()) {
-        TODO("是基础类型, 可以直接创建 ValueImpl. ")
+        return valueImplPrimitive(classifier) as SerializerAwareValue<*>
     }
 
     // 复合类型
 
     when (classifier) {
-        Map::class -> {
+        MutableMap::class,
+        Map::class
+        -> {
             val keyClass = type.arguments[0].type?.classifier
             require(keyClass is KClass<*>)
 
             val valueClass = type.arguments[1].type?.classifier
             require(valueClass is KClass<*>)
 
-            if (keyClass.isPrimitiveOrBuiltInSerializableValue() && valueClass.isPrimitiveOrBuiltInSerializableValue()) {
+            if (primitiveCollectionsImplemented && keyClass.isPrimitiveOrBuiltInSerializableValue() && valueClass.isPrimitiveOrBuiltInSerializableValue()) {
                 // PrimitiveIntIntMap
                 // ...
                 TODO()
             } else {
                 return createCompositeMapValueImpl<Any?, Any?>(
-                    kToValue = { valueFromKType(type.arguments[0].type!!) },
-                    vToValue = { valueFromKType(type.arguments[1].type!!) }
+                    kToValue = { k -> valueFromKType<Any?>(type.arguments[0].type!!).also { it.value = k } },
+                    vToValue = { v -> valueFromKType<Any?>(type.arguments[1].type!!).also { it.value = v } }
                 ).serializableValueWith(serializerMirai(type) as KSerializer<Map<Any?, Any?>>) // erased
             }
         }
-        List::class -> {
+        Collection::class,
+        MutableCollection::class,
+        MutableList::class,
+        List::class
+        -> {
             val elementClass = type.arguments[0].type?.classifier
             require(elementClass is KClass<*>)
 
-            if (elementClass.isPrimitiveOrBuiltInSerializableValue()) {
+            if (primitiveCollectionsImplemented && elementClass.isPrimitiveOrBuiltInSerializableValue()) {
                 // PrimitiveIntList
                 // ...
                 TODO()
@@ -67,11 +76,13 @@ internal fun Setting.valueFromKTypeImpl(type: KType): SerializableValue<*> {
                     .serializableValueWith(serializerMirai(type) as KSerializer<List<Any?>>)
             }
         }
-        Set::class -> {
+        MutableSet::class,
+        Set::class
+        -> {
             val elementClass = type.arguments[0].type?.classifier
             require(elementClass is KClass<*>)
 
-            if (elementClass.isPrimitiveOrBuiltInSerializableValue()) {
+            if (primitiveCollectionsImplemented && elementClass.isPrimitiveOrBuiltInSerializableValue()) {
                 // PrimitiveIntSet
                 // ...
                 TODO()
@@ -85,7 +96,6 @@ internal fun Setting.valueFromKTypeImpl(type: KType): SerializableValue<*> {
 }
 
 internal fun KClass<*>.isPrimitiveOrBuiltInSerializableValue(): Boolean {
-    return false // debug
     when (this) {
         Byte::class, Short::class, Int::class, Long::class,
         Boolean::class,
diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/_PrimitiveValueDeclarations.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/_PrimitiveValueDeclarations.kt
new file mode 100644
index 000000000..cb2898a6f
--- /dev/null
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/_PrimitiveValueDeclarations.kt
@@ -0,0 +1,346 @@
+/*
+ * Copyright 2020 Mamoe Technologies and contributors.
+ *
+ * 此源代码的使用受 GNU AFFERO GENERAL PUBLIC LICENSE version 3 许可证的约束, 可以在以下链接找到该许可证.
+ * Use of this source code is governed by the GNU AGPLv3 license that can be found through the following link.
+ *
+ * https://github.com/mamoe/mirai/blob/master/LICENSE
+ */
+
+package net.mamoe.mirai.console.setting.internal
+
+import kotlinx.serialization.Decoder
+import kotlinx.serialization.Encoder
+import kotlinx.serialization.KSerializer
+import kotlinx.serialization.SerialDescriptor
+import kotlinx.serialization.builtins.serializer
+import net.mamoe.mirai.console.setting.*
+
+/**
+ * The super class to all ValueImpl s
+ */
+internal abstract class AbstractValueImpl<T> : Value<T> {
+    open fun setValueBySerializer(value: T) {
+        this.value = value
+    }
+}
+
+internal fun <T> Value<T>.setValueBySerializer(value: T) = (this as AbstractValueImpl<T>).setValueBySerializer(value)
+
+//// region PrimitiveValuesImpl CODEGEN ////
+
+internal abstract class ByteValueImpl : ByteValue, SerializerAwareValue<Byte>, KSerializer<Unit>,
+    AbstractValueImpl<Byte> {
+    constructor()
+    constructor(default: Byte) {
+        _value = default
+    }
+
+    private var _value: Byte? = null
+
+    final override var value: Byte
+        get() = _value ?: error("ByteValue.value should be initialized before get.")
+        set(v) {
+            if (v != this._value) {
+                this._value = v
+                onChanged()
+            }
+        }
+
+    protected abstract fun onChanged()
+
+    final override val serializer: KSerializer<Unit> get() = this
+    final override val descriptor: SerialDescriptor get() = BuiltInSerializerConstants.ByteSerializerDescriptor
+    final override fun serialize(encoder: Encoder, value: Unit) = Byte.serializer().serialize(encoder, this.value)
+    final override fun deserialize(decoder: Decoder) = setValueBySerializer(Byte.serializer().deserialize(decoder))
+    override fun toString(): String = _value?.toString() ?: "ByteValue.value not yet initialized."
+    override fun equals(other: Any?): Boolean =
+        other is ByteValueImpl && other::class.java == this::class.java && other._value == this._value
+
+    override fun hashCode(): Int {
+        val value = _value
+        return if (value == null) 1
+        else value.hashCode() * 31
+    }
+}
+
+internal abstract class ShortValueImpl : ShortValue, SerializerAwareValue<Short>, KSerializer<Unit>,
+    AbstractValueImpl<Short> {
+    constructor()
+    constructor(default: Short) {
+        _value = default
+    }
+
+    private var _value: Short? = null
+
+    final override var value: Short
+        get() = _value ?: error("ShortValue.value should be initialized before get.")
+        set(v) {
+            if (v != this._value) {
+                this._value = v
+                onChanged()
+            }
+        }
+
+    protected abstract fun onChanged()
+
+    final override val serializer: KSerializer<Unit> get() = this
+    final override val descriptor: SerialDescriptor get() = BuiltInSerializerConstants.ShortSerializerDescriptor
+    final override fun serialize(encoder: Encoder, value: Unit) = Short.serializer().serialize(encoder, this.value)
+    final override fun deserialize(decoder: Decoder) = setValueBySerializer(Short.serializer().deserialize(decoder))
+    override fun toString(): String = _value?.toString() ?: "ShortValue.value not yet initialized."
+    override fun equals(other: Any?): Boolean =
+        other is ShortValueImpl && other::class.java == this::class.java && other._value == this._value
+
+    override fun hashCode(): Int {
+        val value = _value
+        return if (value == null) 1
+        else value.hashCode() * 31
+    }
+}
+
+internal abstract class IntValueImpl : IntValue, SerializerAwareValue<Int>, KSerializer<Unit>, AbstractValueImpl<Int> {
+    constructor()
+    constructor(default: Int) {
+        _value = default
+    }
+
+    private var _value: Int? = null
+
+    final override var value: Int
+        get() = _value ?: error("IntValue.value should be initialized before get.")
+        set(v) {
+            if (v != this._value) {
+                this._value = v
+                onChanged()
+            }
+        }
+
+    protected abstract fun onChanged()
+
+    final override val serializer: KSerializer<Unit> get() = this
+    final override val descriptor: SerialDescriptor get() = BuiltInSerializerConstants.IntSerializerDescriptor
+    final override fun serialize(encoder: Encoder, value: Unit) = Int.serializer().serialize(encoder, this.value)
+    final override fun deserialize(decoder: Decoder) = setValueBySerializer(Int.serializer().deserialize(decoder))
+    override fun toString(): String = _value?.toString() ?: "IntValue.value not yet initialized."
+    override fun equals(other: Any?): Boolean =
+        other is IntValueImpl && other::class.java == this::class.java && other._value == this._value
+
+    override fun hashCode(): Int {
+        val value = _value
+        return if (value == null) 1
+        else value.hashCode() * 31
+    }
+}
+
+internal abstract class LongValueImpl : LongValue, SerializerAwareValue<Long>, KSerializer<Unit>,
+    AbstractValueImpl<Long> {
+    constructor()
+    constructor(default: Long) {
+        _value = default
+    }
+
+    private var _value: Long? = null
+
+    final override var value: Long
+        get() = _value ?: error("LongValue.value should be initialized before get.")
+        set(v) {
+            if (v != this._value) {
+                this._value = v
+                onChanged()
+            }
+        }
+
+    protected abstract fun onChanged()
+
+    final override val serializer: KSerializer<Unit> get() = this
+    final override val descriptor: SerialDescriptor get() = BuiltInSerializerConstants.LongSerializerDescriptor
+    final override fun serialize(encoder: Encoder, value: Unit) = Long.serializer().serialize(encoder, this.value)
+    final override fun deserialize(decoder: Decoder) = setValueBySerializer(Long.serializer().deserialize(decoder))
+    override fun toString(): String = _value?.toString() ?: "LongValue.value not yet initialized."
+    override fun equals(other: Any?): Boolean =
+        other is LongValueImpl && other::class.java == this::class.java && other._value == this._value
+
+    override fun hashCode(): Int {
+        val value = _value
+        return if (value == null) 1
+        else value.hashCode() * 31
+    }
+}
+
+internal abstract class FloatValueImpl : FloatValue, SerializerAwareValue<Float>, KSerializer<Unit>,
+    AbstractValueImpl<Float> {
+    constructor()
+    constructor(default: Float) {
+        _value = default
+    }
+
+    private var _value: Float? = null
+
+    final override var value: Float
+        get() = _value ?: error("FloatValue.value should be initialized before get.")
+        set(v) {
+            if (v != this._value) {
+                this._value = v
+                onChanged()
+            }
+        }
+
+    protected abstract fun onChanged()
+
+    final override val serializer: KSerializer<Unit> get() = this
+    final override val descriptor: SerialDescriptor get() = BuiltInSerializerConstants.FloatSerializerDescriptor
+    final override fun serialize(encoder: Encoder, value: Unit) = Float.serializer().serialize(encoder, this.value)
+    final override fun deserialize(decoder: Decoder) = setValueBySerializer(Float.serializer().deserialize(decoder))
+    override fun toString(): String = _value?.toString() ?: "FloatValue.value not yet initialized."
+    override fun equals(other: Any?): Boolean =
+        other is FloatValueImpl && other::class.java == this::class.java && other._value == this._value
+
+    override fun hashCode(): Int {
+        val value = _value
+        return if (value == null) 1
+        else value.hashCode() * 31
+    }
+}
+
+internal abstract class DoubleValueImpl : DoubleValue, SerializerAwareValue<Double>, KSerializer<Unit>,
+    AbstractValueImpl<Double> {
+    constructor()
+    constructor(default: Double) {
+        _value = default
+    }
+
+    private var _value: Double? = null
+
+    final override var value: Double
+        get() = _value ?: error("DoubleValue.value should be initialized before get.")
+        set(v) {
+            if (v != this._value) {
+                this._value = v
+                onChanged()
+            }
+        }
+
+    protected abstract fun onChanged()
+
+    final override val serializer: KSerializer<Unit> get() = this
+    final override val descriptor: SerialDescriptor get() = BuiltInSerializerConstants.DoubleSerializerDescriptor
+    final override fun serialize(encoder: Encoder, value: Unit) = Double.serializer().serialize(encoder, this.value)
+    final override fun deserialize(decoder: Decoder) = setValueBySerializer(Double.serializer().deserialize(decoder))
+    override fun toString(): String = _value?.toString() ?: "DoubleValue.value not yet initialized."
+    override fun equals(other: Any?): Boolean =
+        other is DoubleValueImpl && other::class.java == this::class.java && other._value == this._value
+
+    override fun hashCode(): Int {
+        val value = _value
+        return if (value == null) 1
+        else value.hashCode() * 31
+    }
+}
+
+internal abstract class CharValueImpl : CharValue, SerializerAwareValue<Char>, KSerializer<Unit>,
+    AbstractValueImpl<Char> {
+    constructor()
+    constructor(default: Char) {
+        _value = default
+    }
+
+    private var _value: Char? = null
+
+    final override var value: Char
+        get() = _value ?: error("CharValue.value should be initialized before get.")
+        set(v) {
+            if (v != this._value) {
+                this._value = v
+                onChanged()
+            }
+        }
+
+    protected abstract fun onChanged()
+
+    final override val serializer: KSerializer<Unit> get() = this
+    final override val descriptor: SerialDescriptor get() = BuiltInSerializerConstants.CharSerializerDescriptor
+    final override fun serialize(encoder: Encoder, value: Unit) = Char.serializer().serialize(encoder, this.value)
+    final override fun deserialize(decoder: Decoder) = setValueBySerializer(Char.serializer().deserialize(decoder))
+    override fun toString(): String = _value?.toString() ?: "CharValue.value not yet initialized."
+    override fun equals(other: Any?): Boolean =
+        other is CharValueImpl && other::class.java == this::class.java && other._value == this._value
+
+    override fun hashCode(): Int {
+        val value = _value
+        return if (value == null) 1
+        else value.hashCode() * 31
+    }
+}
+
+internal abstract class BooleanValueImpl : BooleanValue, SerializerAwareValue<Boolean>, KSerializer<Unit>,
+    AbstractValueImpl<Boolean> {
+    constructor()
+    constructor(default: Boolean) {
+        _value = default
+    }
+
+    private var _value: Boolean? = null
+
+    final override var value: Boolean
+        get() = _value ?: error("BooleanValue.value should be initialized before get.")
+        set(v) {
+            if (v != this._value) {
+                this._value = v
+                onChanged()
+            }
+        }
+
+    protected abstract fun onChanged()
+
+    final override val serializer: KSerializer<Unit> get() = this
+    final override val descriptor: SerialDescriptor get() = BuiltInSerializerConstants.BooleanSerializerDescriptor
+    final override fun serialize(encoder: Encoder, value: Unit) = Boolean.serializer().serialize(encoder, this.value)
+    final override fun deserialize(decoder: Decoder) = setValueBySerializer(Boolean.serializer().deserialize(decoder))
+    override fun toString(): String = _value?.toString() ?: "BooleanValue.value not yet initialized."
+    override fun equals(other: Any?): Boolean =
+        other is BooleanValueImpl && other::class.java == this::class.java && other._value == this._value
+
+    override fun hashCode(): Int {
+        val value = _value
+        return if (value == null) 1
+        else value.hashCode() * 31
+    }
+}
+
+internal abstract class StringValueImpl : StringValue, SerializerAwareValue<String>, KSerializer<Unit>,
+    AbstractValueImpl<String> {
+    constructor()
+    constructor(default: String) {
+        _value = default
+    }
+
+    private var _value: String? = null
+
+    final override var value: String
+        get() = _value ?: error("StringValue.value should be initialized before get.")
+        set(v) {
+            if (v != this._value) {
+                this._value = v
+                onChanged()
+            }
+        }
+
+    protected abstract fun onChanged()
+
+    final override val serializer: KSerializer<Unit> get() = this
+    final override val descriptor: SerialDescriptor get() = BuiltInSerializerConstants.StringSerializerDescriptor
+    final override fun serialize(encoder: Encoder, value: Unit) = String.serializer().serialize(encoder, this.value)
+    final override fun deserialize(decoder: Decoder) = setValueBySerializer(String.serializer().deserialize(decoder))
+    override fun toString(): String = _value ?: "StringValue.value not yet initialized."
+    override fun equals(other: Any?): Boolean =
+        other is StringValueImpl && other::class.java == this::class.java && other._value == this._value
+
+    override fun hashCode(): Int {
+        val value = _value
+        return if (value == null) 1
+        else value.hashCode() * 31
+    }
+}
+
+//// endregion PrimitiveValuesImpl CODEGEN ////
diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/_PrimitiveValueDeclareations.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/_PrimitiveValueDeclareations.kt
deleted file mode 100644
index cb9bee61b..000000000
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/_PrimitiveValueDeclareations.kt
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright 2020 Mamoe Technologies and contributors.
- *
- * 此源代码的使用受 GNU AFFERO GENERAL PUBLIC LICENSE version 3 许可证的约束, 可以在以下链接找到该许可证.
- * Use of this source code is governed by the GNU AGPLv3 license that can be found through the following link.
- *
- * https://github.com/mamoe/mirai/blob/master/LICENSE
- */
-
-package net.mamoe.mirai.console.setting.internal
-
-import kotlinx.serialization.Decoder
-import kotlinx.serialization.Encoder
-import kotlinx.serialization.KSerializer
-import kotlinx.serialization.SerialDescriptor
-import kotlinx.serialization.builtins.serializer
-import net.mamoe.mirai.console.setting.IntValue
-import net.mamoe.mirai.console.setting.SerializerAwareValue
-
-
-//// region PrimitiveValues CODEGEN ////
-
-// TODO: 2020/6/21 CODEGEN
-
-internal abstract class IntValueImpl : IntValue, SerializerAwareValue<Int>, KSerializer<Unit> {
-    constructor()
-    constructor(default: Int) {
-        _value = default
-    }
-
-    private var _value: Int? = null
-
-    final override var value: Int
-        get() = _value ?: error("IntValue.value should be initialized before get.")
-        set(v) {
-            if (v != this._value) {
-                this._value = v
-                onChanged()
-            }
-        }
-
-    protected abstract fun onChanged()
-
-    final override val serializer: KSerializer<Unit> get() = this
-    final override val descriptor: SerialDescriptor get() = BuiltInSerializerConstants.IntSerializerDescriptor
-    final override fun serialize(encoder: Encoder, value: Unit) = Int.serializer().serialize(encoder, this.value)
-    final override fun deserialize(decoder: Decoder) {
-        value = Int.serializer().deserialize(decoder)
-    }
-}
-
-//// endregion PrimitiveValues CODEGEN ////
diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/_Setting.value.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/_Setting.value.kt
index 4d01fbfe5..3b34fe942 100644
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/_Setting.value.kt
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/_Setting.value.kt
@@ -12,10 +12,11 @@ package net.mamoe.mirai.console.setting.internal
 import kotlinx.serialization.builtins.serializer
 import net.mamoe.mirai.console.setting.SerializerAwareValue
 import net.mamoe.mirai.console.setting.Setting
+import kotlin.reflect.KClass
 
 
 internal object BuiltInSerializerConstants {
-//// region BuiltInSerializerConstants primitives CODEGEN ////
+    //// region BuiltInSerializerConstantsPrimitives CODEGEN ////
 
     @JvmStatic
     val ByteSerializerDescriptor = Byte.serializer().descriptor
@@ -44,13 +45,55 @@ internal object BuiltInSerializerConstants {
     @JvmStatic
     val StringSerializerDescriptor = String.serializer().descriptor
 
-
-//// endregion BuiltInSerializerConstants primitives CODEGEN ////
+    //// endregion BuiltInSerializerConstantsPrimitives CODEGEN ////
 }
 
-//// region Setting.value primitives impl CODEGEN ////
+@Suppress("UNCHECKED_CAST")
+internal fun <T : Any> Setting.valueImplPrimitive(kClass: KClass<T>): SerializerAwareValue<T>? {
+    return when (kClass) {
+        //// region Setting_valueImplPrimitive CODEGEN ////
 
-// TODO: 2020/6/21 CODEGEN
+        Byte::class -> byteValueImpl()
+        Short::class -> shortValueImpl()
+        Int::class -> intValueImpl()
+        Long::class -> longValueImpl()
+        Float::class -> floatValueImpl()
+        Double::class -> doubleValueImpl()
+        Char::class -> charValueImpl()
+        Boolean::class -> booleanValueImpl()
+        String::class -> stringValueImpl()
+
+        //// endregion Setting_valueImplPrimitive CODEGEN ////
+        else -> error("Internal error: unexpected type passed: ${kClass.qualifiedName}")
+    } as SerializerAwareValue<T>?
+}
+
+
+//// region Setting_value_PrimitivesImpl CODEGEN ////
+
+internal fun Setting.valueImpl(default: Byte): SerializerAwareValue<Byte> {
+    return object : ByteValueImpl(default) {
+        override fun onChanged() = this@valueImpl.onValueChanged(this)
+    }
+}
+
+internal fun Setting.byteValueImpl(): SerializerAwareValue<Byte> {
+    return object : ByteValueImpl() {
+        override fun onChanged() = this@byteValueImpl.onValueChanged(this)
+    }
+}
+
+internal fun Setting.valueImpl(default: Short): SerializerAwareValue<Short> {
+    return object : ShortValueImpl(default) {
+        override fun onChanged() = this@valueImpl.onValueChanged(this)
+    }
+}
+
+internal fun Setting.shortValueImpl(): SerializerAwareValue<Short> {
+    return object : ShortValueImpl() {
+        override fun onChanged() = this@shortValueImpl.onValueChanged(this)
+    }
+}
 
 internal fun Setting.valueImpl(default: Int): SerializerAwareValue<Int> {
     return object : IntValueImpl(default) {
@@ -58,4 +101,82 @@ internal fun Setting.valueImpl(default: Int): SerializerAwareValue<Int> {
     }
 }
 
-//// endregion Setting.value primitives impl CODEGEN ////
+internal fun Setting.intValueImpl(): SerializerAwareValue<Int> {
+    return object : IntValueImpl() {
+        override fun onChanged() = this@intValueImpl.onValueChanged(this)
+    }
+}
+
+internal fun Setting.valueImpl(default: Long): SerializerAwareValue<Long> {
+    return object : LongValueImpl(default) {
+        override fun onChanged() = this@valueImpl.onValueChanged(this)
+    }
+}
+
+internal fun Setting.longValueImpl(): SerializerAwareValue<Long> {
+    return object : LongValueImpl() {
+        override fun onChanged() = this@longValueImpl.onValueChanged(this)
+    }
+}
+
+internal fun Setting.valueImpl(default: Float): SerializerAwareValue<Float> {
+    return object : FloatValueImpl(default) {
+        override fun onChanged() = this@valueImpl.onValueChanged(this)
+    }
+}
+
+internal fun Setting.floatValueImpl(): SerializerAwareValue<Float> {
+    return object : FloatValueImpl() {
+        override fun onChanged() = this@floatValueImpl.onValueChanged(this)
+    }
+}
+
+internal fun Setting.valueImpl(default: Double): SerializerAwareValue<Double> {
+    return object : DoubleValueImpl(default) {
+        override fun onChanged() = this@valueImpl.onValueChanged(this)
+    }
+}
+
+internal fun Setting.doubleValueImpl(): SerializerAwareValue<Double> {
+    return object : DoubleValueImpl() {
+        override fun onChanged() = this@doubleValueImpl.onValueChanged(this)
+    }
+}
+
+internal fun Setting.valueImpl(default: Char): SerializerAwareValue<Char> {
+    return object : CharValueImpl(default) {
+        override fun onChanged() = this@valueImpl.onValueChanged(this)
+    }
+}
+
+internal fun Setting.charValueImpl(): SerializerAwareValue<Char> {
+    return object : CharValueImpl() {
+        override fun onChanged() = this@charValueImpl.onValueChanged(this)
+    }
+}
+
+internal fun Setting.valueImpl(default: Boolean): SerializerAwareValue<Boolean> {
+    return object : BooleanValueImpl(default) {
+        override fun onChanged() = this@valueImpl.onValueChanged(this)
+    }
+}
+
+internal fun Setting.booleanValueImpl(): SerializerAwareValue<Boolean> {
+    return object : BooleanValueImpl() {
+        override fun onChanged() = this@booleanValueImpl.onValueChanged(this)
+    }
+}
+
+internal fun Setting.valueImpl(default: String): SerializerAwareValue<String> {
+    return object : StringValueImpl(default) {
+        override fun onChanged() = this@valueImpl.onValueChanged(this)
+    }
+}
+
+internal fun Setting.stringValueImpl(): SerializerAwareValue<String> {
+    return object : StringValueImpl() {
+        override fun onChanged() = this@stringValueImpl.onValueChanged(this)
+    }
+}
+
+//// endregion Setting_value_PrimitivesImpl CODEGEN ////
diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/collectionUtil.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/collectionUtil.kt
index 75208385a..c691f1cd3 100644
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/collectionUtil.kt
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/collectionUtil.kt
@@ -16,6 +16,8 @@ import kotlinx.serialization.serializer
 import net.mamoe.yamlkt.Yaml
 import kotlin.reflect.KClass
 
+// TODO: 2020/6/24 优化性能: 引入一个 comparator 之类来替代将 Int 包装为 Value<Int> 后进行 containsKey 比较的方法
+
 internal inline fun <K, V, KR, VR> MutableMap<K, V>.shadowMap(
     crossinline kTransform: (K) -> KR,
     crossinline kTransformBack: (KR) -> K,
@@ -37,6 +39,13 @@ internal inline fun <K, V, KR, VR> MutableMap<K, V>.shadowMap(
                         override val value: VR get() = entry.value.let(vTransform)
                         override fun setValue(newValue: VR): VR =
                             entry.setValue(newValue.let(vTransformBack)).let(vTransform)
+
+                        override fun hashCode(): Int = 17 * 31 + (key?.hashCode() ?: 0) + (value?.hashCode() ?: 0)
+                        override fun toString(): String = "$key=$value"
+                        override fun equals(other: Any?): Boolean {
+                            if (other == null || other !is Map.Entry<*, *>) return false
+                            return other.key == key && other.value == value
+                        }
                     }
                 } as ((MutableMap.MutableEntry<K, V>) -> MutableMap.MutableEntry<KR, VR>), // type inference bug
                 transformBack = { entry ->
@@ -45,6 +54,13 @@ internal inline fun <K, V, KR, VR> MutableMap<K, V>.shadowMap(
                         override val value: V get() = entry.value.let(vTransformBack)
                         override fun setValue(newValue: V): V =
                             entry.setValue(newValue.let(vTransform)).let(vTransformBack)
+
+                        override fun hashCode(): Int = 17 * 31 + (key?.hashCode() ?: 0) + (value?.hashCode() ?: 0)
+                        override fun toString(): String = "$key=$value"
+                        override fun equals(other: Any?): Boolean {
+                            if (other == null || other !is Map.Entry<*, *>) return false
+                            return other.key == key && other.value == value
+                        }
                     }
                 }
             )
@@ -64,6 +80,8 @@ internal inline fun <K, V, KR, VR> MutableMap<K, V>.shadowMap(
         }
 
         override fun remove(key: KR): VR? = this@shadowMap.remove(key.let(kTransformBack))?.let(vTransform)
+        override fun toString(): String = this@shadowMap.toString()
+        override fun hashCode(): Int = this@shadowMap.hashCode()
     }
 }
 
@@ -82,6 +100,8 @@ internal inline fun <E, R> MutableCollection<E>.shadowMap(
             override fun hasNext(): Boolean = delegate.hasNext()
             override fun next(): R = delegate.next().let(transform)
             override fun remove() = delegate.remove()
+            override fun toString(): String = delegate.toString()
+            override fun hashCode(): Int = delegate.hashCode()
         }
 
         override fun add(element: R): Boolean = this@shadowMap.add(element.let(transformBack))
@@ -92,6 +112,8 @@ internal inline fun <E, R> MutableCollection<E>.shadowMap(
         override fun remove(element: R): Boolean = this@shadowMap.removeIf { it.let(transform) == element }
         override fun removeAll(elements: Collection<R>): Boolean = elements.all(::remove)
         override fun retainAll(elements: Collection<R>): Boolean = this@shadowMap.retainAll(elements.map(transformBack))
+        override fun toString(): String = this@shadowMap.toString()
+        override fun hashCode(): Int = this@shadowMap.hashCode()
     }
 }
 
@@ -112,6 +134,8 @@ internal inline fun <E, R> MutableList<E>.shadowMap(
             override fun hasNext(): Boolean = delegate.hasNext()
             override fun next(): R = delegate.next().let(transform)
             override fun remove() = delegate.remove()
+            override fun toString(): String = delegate.toString()
+            override fun hashCode(): Int = delegate.hashCode()
         }
 
         override fun lastIndexOf(element: R): Int = this@shadowMap.indexOfLast { it.let(transform) == element }
@@ -134,6 +158,8 @@ internal inline fun <E, R> MutableList<E>.shadowMap(
             override fun next(): R = delegate.next().let(transform)
             override fun remove() = delegate.remove()
             override fun set(element: R) = delegate.set(element.let(transformBack))
+            override fun toString(): String = delegate.toString()
+            override fun hashCode(): Int = delegate.hashCode()
         }
 
         override fun listIterator(index: Int): MutableListIterator<R> = object : MutableListIterator<R> {
@@ -147,6 +173,8 @@ internal inline fun <E, R> MutableList<E>.shadowMap(
             override fun next(): R = delegate.next().let(transform)
             override fun remove() = delegate.remove()
             override fun set(element: R) = delegate.set(element.let(transformBack))
+            override fun toString(): String = delegate.toString()
+            override fun hashCode(): Int = delegate.hashCode()
         }
 
         override fun remove(element: R): Boolean = this@shadowMap.removeIf { it.let(transform) == element }
@@ -158,6 +186,9 @@ internal inline fun <E, R> MutableList<E>.shadowMap(
 
         override fun subList(fromIndex: Int, toIndex: Int): MutableList<R> =
             this@shadowMap.subList(fromIndex, toIndex).map(transform).toMutableList()
+
+        override fun toString(): String = this@shadowMap.toString()
+        override fun hashCode(): Int = this@shadowMap.hashCode()
     }
 }
 
@@ -177,6 +208,8 @@ internal inline fun <E, R> MutableSet<E>.shadowMap(
             override fun hasNext(): Boolean = delegate.hasNext()
             override fun next(): R = delegate.next().let(transform)
             override fun remove() = delegate.remove()
+            override fun toString(): String = delegate.toString()
+            override fun hashCode(): Int = delegate.hashCode()
         }
 
         override fun add(element: R): Boolean = this@shadowMap.add(element.let(transformBack))
@@ -186,6 +219,8 @@ internal inline fun <E, R> MutableSet<E>.shadowMap(
         override fun remove(element: R): Boolean = this@shadowMap.removeIf { it.let(transform) == element }
         override fun removeAll(elements: Collection<R>): Boolean = elements.all(::remove)
         override fun retainAll(elements: Collection<R>): Boolean = this@shadowMap.retainAll(elements.map(transformBack))
+        override fun toString(): String = this@shadowMap.toString()
+        override fun hashCode(): Int = this@shadowMap.hashCode()
     }
 }
 
@@ -202,6 +237,8 @@ internal inline fun <T> dynamicList(crossinline supplier: () -> List<T>): List<T
         override fun listIterator(): ListIterator<T> = supplier().listIterator()
         override fun listIterator(index: Int): ListIterator<T> = supplier().listIterator(index)
         override fun subList(fromIndex: Int, toIndex: Int): List<T> = supplier().subList(fromIndex, toIndex)
+        override fun toString(): String = supplier().toString()
+        override fun hashCode(): Int = supplier().hashCode()
     }
 }
 
@@ -212,6 +249,8 @@ internal inline fun <T> dynamicSet(crossinline supplier: () -> Set<T>): Set<T> {
         override fun containsAll(elements: Collection<T>): Boolean = supplier().containsAll(elements)
         override fun isEmpty(): Boolean = supplier().isEmpty()
         override fun iterator(): Iterator<T> = supplier().iterator()
+        override fun toString(): String = supplier().toString()
+        override fun hashCode(): Int = supplier().hashCode()
     }
 }
 
@@ -239,6 +278,8 @@ internal inline fun <T> dynamicMutableList(crossinline supplier: () -> MutableLi
         override fun retainAll(elements: Collection<T>): Boolean = supplier().retainAll(elements)
         override fun set(index: Int, element: T): T = supplier().set(index, element)
         override fun subList(fromIndex: Int, toIndex: Int): MutableList<T> = supplier().subList(fromIndex, toIndex)
+        override fun toString(): String = supplier().toString()
+        override fun hashCode(): Int = supplier().hashCode()
     }
 }
 
@@ -256,6 +297,8 @@ internal inline fun <T> dynamicMutableSet(crossinline supplier: () -> MutableSet
         override fun remove(element: T): Boolean = supplier().remove(element)
         override fun removeAll(elements: Collection<T>): Boolean = supplier().removeAll(elements)
         override fun retainAll(elements: Collection<T>): Boolean = supplier().retainAll(elements)
+        override fun toString(): String = supplier().toString()
+        override fun hashCode(): Int = supplier().hashCode()
     }
 }
 
@@ -273,6 +316,8 @@ internal inline fun <K, V> MutableMap<K, V>.observable(crossinline onChanged: ()
         override fun put(key: K, value: V): V? = this@observable.put(key, value).also { onChanged() }
         override fun putAll(from: Map<out K, V>) = this@observable.putAll(from).also { onChanged() }
         override fun remove(key: K): V? = this@observable.remove(key).also { onChanged() }
+        override fun toString(): String = this@observable.toString()
+        override fun hashCode(): Int = this@observable.hashCode()
     }
 }
 
@@ -289,6 +334,8 @@ internal inline fun <T> MutableList<T>.observable(crossinline onChanged: () -> U
             override fun hasNext(): Boolean = delegate.hasNext()
             override fun next(): T = delegate.next()
             override fun remove() = delegate.remove().also { onChanged() }
+            override fun toString(): String = delegate.toString()
+            override fun hashCode(): Int = delegate.hashCode()
         }
 
         override fun lastIndexOf(element: T): Int = this@observable.lastIndexOf(element)
@@ -310,6 +357,8 @@ internal inline fun <T> MutableList<T>.observable(crossinline onChanged: () -> U
             override fun next(): T = delegate.next()
             override fun remove() = delegate.remove().also { onChanged() }
             override fun set(element: T) = delegate.set(element).also { onChanged() }
+            override fun toString(): String = delegate.toString()
+            override fun hashCode(): Int = delegate.hashCode()
         }
 
         override fun listIterator(index: Int): MutableListIterator<T> = object : MutableListIterator<T> {
@@ -323,6 +372,8 @@ internal inline fun <T> MutableList<T>.observable(crossinline onChanged: () -> U
             override fun next(): T = delegate.next()
             override fun remove() = delegate.remove().also { onChanged() }
             override fun set(element: T) = delegate.set(element).also { onChanged() }
+            override fun toString(): String = delegate.toString()
+            override fun hashCode(): Int = delegate.hashCode()
         }
 
         override fun remove(element: T): Boolean = this@observable.remove(element).also { onChanged() }
@@ -335,6 +386,8 @@ internal inline fun <T> MutableList<T>.observable(crossinline onChanged: () -> U
 
         override fun set(index: Int, element: T): T = this@observable.set(index, element).also { onChanged() }
         override fun subList(fromIndex: Int, toIndex: Int): MutableList<T> = this@observable.subList(fromIndex, toIndex)
+        override fun toString(): String = this@observable.toString()
+        override fun hashCode(): Int = this@observable.hashCode()
     }
 }
 
@@ -349,6 +402,8 @@ internal inline fun <T> MutableCollection<T>.observable(crossinline onChanged: (
             override fun hasNext(): Boolean = delegate.hasNext()
             override fun next(): T = delegate.next()
             override fun remove() = delegate.remove().also { onChanged() }
+            override fun toString(): String = delegate.toString()
+            override fun hashCode(): Int = delegate.hashCode()
         }
 
         override fun add(element: T): Boolean = this@observable.add(element).also { onChanged() }
@@ -360,6 +415,9 @@ internal inline fun <T> MutableCollection<T>.observable(crossinline onChanged: (
 
         override fun retainAll(elements: Collection<T>): Boolean =
             this@observable.retainAll(elements).also { onChanged() }
+
+        override fun toString(): String = this@observable.toString()
+        override fun hashCode(): Int = this@observable.hashCode()
     }
 }
 
@@ -374,6 +432,8 @@ internal inline fun <T> MutableSet<T>.observable(crossinline onChanged: () -> Un
             override fun hasNext(): Boolean = delegate.hasNext()
             override fun next(): T = delegate.next()
             override fun remove() = delegate.remove().also { onChanged() }
+            override fun toString(): String = delegate.toString()
+            override fun hashCode(): Int = delegate.hashCode()
         }
 
         override fun add(element: T): Boolean = this@observable.add(element).also { onChanged() }
@@ -385,6 +445,9 @@ internal inline fun <T> MutableSet<T>.observable(crossinline onChanged: () -> Un
 
         override fun retainAll(elements: Collection<T>): Boolean =
             this@observable.retainAll(elements).also { onChanged() }
+
+        override fun toString(): String = this@observable.toString()
+        override fun hashCode(): Int = this@observable.hashCode()
     }
 }
 
diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/serializerUtil.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/serializerUtil.kt
index 454544929..7887e4052 100644
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/serializerUtil.kt
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/internal/serializerUtil.kt
@@ -15,6 +15,8 @@ import kotlin.reflect.full.findAnnotation
 
 internal val KProperty<*>.serialNameOrPropertyName: String get() = this.findAnnotation<SerialName>()?.value ?: this.name
 
+internal fun Int.isOdd() = this and 0b1 != 0
+
 internal inline fun <E> KSerializer<E>.bind(
     crossinline setter: (E) -> Unit,
     crossinline getter: () -> E
diff --git a/backend/mirai-console/src/test/kotlin/net/mamoe/mirai/console/setting/SettingTest.kt b/backend/mirai-console/src/test/kotlin/net/mamoe/mirai/console/setting/SettingTest.kt
index a0abf50e5..893bcd131 100644
--- a/backend/mirai-console/src/test/kotlin/net/mamoe/mirai/console/setting/SettingTest.kt
+++ b/backend/mirai-console/src/test/kotlin/net/mamoe/mirai/console/setting/SettingTest.kt
@@ -9,21 +9,121 @@
 
 package net.mamoe.mirai.console.setting
 
-import net.mamoe.yamlkt.Yaml
+import kotlinx.serialization.UnstableDefault
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.JsonConfiguration
 import org.junit.jupiter.api.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertSame
 
 internal class SettingTest {
 
     class MySetting : Setting() {
-        val int by value(1)
+        var int by value(1)
         val map by valueReified(mapOf("" to ""))
-        val map2 by valueReified(mapOf("" to mapOf("" to mapOf("" to ""))))
+        val map2 by valueReified(mutableMapOf("" to mutableMapOf("" to "")))
+    }
+
+    @OptIn(UnstableDefault::class)
+    private val jsonPrettyPrint = Json(JsonConfiguration(prettyPrint = true))
+    private val json = Json(JsonConfiguration.Stable)
+
+    @Test
+    fun testStringify() {
+        val setting = MySetting()
+
+        var string = json.stringify(setting.updaterSerializer, Unit)
+        assertEquals("""{"int":1,"map":{},"map2":{}}""", string)
+
+        setting.int = 2
+
+        string = json.stringify(setting.updaterSerializer, Unit)
+        assertEquals("""{"int":2,"map":{},"map2":{}}""", string)
     }
 
     @Test
-    fun testPrimitive() {
+    fun testParseUpdate() {
         val setting = MySetting()
-        val string = Yaml.nonStrict.stringify(setting.updaterSerializer, Unit)
-        println(string)
+
+        assertEquals(1, setting.int)
+
+        json.parse(
+            setting.updaterSerializer, """
+            {"int":3,"map":{},"map2":{}}
+        """.trimIndent()
+        )
+
+        assertEquals(3, setting.int)
+    }
+
+    @Test
+    fun testNestedParseUpdate() {
+        val setting = MySetting()
+
+        fun delegation() = setting.map
+
+        val refBefore = setting.map
+        fun reference() = refBefore
+
+        assertEquals(mapOf(), delegation()) // delegation
+
+        json.parse(
+            setting.updaterSerializer, """
+            {"int":1,"map":{"t":"test"},"map2":{}}
+        """.trimIndent()
+        )
+
+        assertEquals(mapOf("t" to "test").toString(), delegation().toString())
+        assertEquals(mapOf("t" to "test").toString(), reference().toString())
+
+        assertSame(reference(), delegation()) // check shadowing
+    }
+
+    @Test
+    fun testDeepNestedParseUpdate() {
+        val setting = MySetting()
+
+        fun delegation() = setting.map2
+
+        val refBefore = setting.map2
+        fun reference() = refBefore
+
+        assertEquals(mutableMapOf(), delegation()) // delegation
+
+        json.parse(
+            setting.updaterSerializer, """
+            {"int":1,"map":{},"map2":{"t":{"f":"test"}}}
+        """.trimIndent()
+        )
+
+        assertEquals(mapOf("t" to mapOf("f" to "test")).toString(), delegation().toString())
+        assertEquals(mapOf("t" to mapOf("f" to "test")).toString(), reference().toString())
+
+        assertSame(reference(), delegation()) // check shadowing
+    }
+
+    @Test
+    fun testDeepNestedTrackingParseUpdate() {
+        val setting = MySetting()
+
+        setting.map2["t"] = mutableMapOf()
+
+        fun delegation() = setting.map2["t"]!!
+
+        val refBefore = setting.map2["t"]!!
+        fun reference() = refBefore
+
+        assertEquals(mutableMapOf(), delegation()) // delegation
+
+        json.parse(
+            setting.updaterSerializer, """
+            {"int":1,"map":{},"map2":{"t":{"f":"test"}}}
+        """.trimIndent()
+        )
+
+        assertEquals(mapOf("f" to "test").toString(), delegation().toString())
+        assertEquals(mapOf("f" to "test").toString(), reference().toString())
+
+        assertSame(reference(), delegation()) // check shadowing
     }
 }
\ No newline at end of file