diff --git a/README.md b/README.md
index 01e84bf8b..c7c86db60 100644
--- a/README.md
+++ b/README.md
@@ -28,8 +28,30 @@
 
 您的 star 是对我们最大的鼓励(点击项目右上角);  
 
+## Features
+#### mirai-core 
+通用 API 模块，请参考此模块调用 Mirai.    
+#### mirai-core-timpc 
+TIM PC （2.3.2 版本，2019 年 8 月）协议的实现，相较于 core，仅新增少量 API. 详见 [README.md](mirai-core-timpc/)   
+支持的功能： 
+- 消息收发：图片文字复合消息，图片消息
+- 群管功能：群员列表，禁言
+
+（目前不再更新，请关注安卓协议）
+
+#### mirai-core-qqandroid 
+QQ for Android （8.2.0 版本，2019 年 12 月）协议的实现，目前还未完成。   
+- 高兼容性：Mirai 协议仅含极少部分为硬编码，其余全部随官方方式动态生成
+- 高安全性：密匙随机，ECDH 动态计算，硬件信息真机模拟（Android 平台获取真机信息）
+
+开发进度：  
+- 完成 密码登录 （2020/1/23）
+- 进行中 验证码登录
+- 进行中 消息解析
+- 进行中 图片上传下载
+
 ## Use directly
-**直接使用Mirai(终端环境/网页面板）.**  
+**直接使用Mirai(终端环境/网页面板（将来））.**  
 [Mirai-Console](https://github.com/mamoe/mirai/tree/master/mirai-console) 插件支持, 在终端中启动Mirai并获得机器人服务
 
 ## Use as a library
@@ -48,6 +70,7 @@ repositories{
 **Mirai 目前还处于实验性阶段, 我们无法保证任何稳定性, API 也可能会随时修改.**
 
 现在 Mirai 只支持 TIM PC 协议.  QQ Android 协议正在开发中.
+
 **common**
 ```kotlin
 implementation("net.mamoe:mirai-core-timpc-common:VERSION")
diff --git a/build.gradle b/build.gradle
index e226a72ca..08d1243f2 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,6 +4,7 @@ buildscript {
         jcenter()
         mavenCentral()
         google()
+        maven { url 'https://dl.bintray.com/kotlin/kotlin-dev/'}
     }
 
     dependencies {
diff --git a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/QQAndroidBotNetworkHandler.kt b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/QQAndroidBotNetworkHandler.kt
index 3b99d7e19..2f40aad9e 100644
--- a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/QQAndroidBotNetworkHandler.kt
+++ b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/QQAndroidBotNetworkHandler.kt
@@ -11,8 +11,7 @@ import net.mamoe.mirai.qqandroid.event.PacketReceivedEvent
 import net.mamoe.mirai.qqandroid.network.protocol.packet.KnownPacketFactories
 import net.mamoe.mirai.qqandroid.network.protocol.packet.OutgoingPacket
 import net.mamoe.mirai.qqandroid.network.protocol.packet.login.LoginPacket
-import net.mamoe.mirai.qqandroid.network.protocol.packet.login.LoginPacket.LoginPacketResponse.Captcha
-import net.mamoe.mirai.qqandroid.network.protocol.packet.login.LoginPacket.LoginPacketResponse.Success
+import net.mamoe.mirai.qqandroid.network.protocol.packet.login.LoginPacket.LoginPacketResponse.*
 import net.mamoe.mirai.qqandroid.network.protocol.packet.login.SvcReqRegisterPacket
 import net.mamoe.mirai.utils.*
 import net.mamoe.mirai.utils.io.*
@@ -31,7 +30,7 @@ internal class QQAndroidBotNetworkHandler(bot: QQAndroidBot) : BotNetworkHandler
         launch(CoroutineName("Incoming Packet Receiver")) { processReceive() }
 
         bot.logger.info("Trying login")
-        when (val response = LoginPacket.SubCommand9(bot.client).sendAndExpect<LoginPacket.LoginPacketResponse>()) {
+        when (val response: LoginPacket.LoginPacketResponse = LoginPacket.SubCommand9(bot.client).sendAndExpect()) {
             is Captcha -> when (response) {
                 is Captcha.Picture -> {
                     bot.logger.info("需要图片验证码")
@@ -41,6 +40,8 @@ internal class QQAndroidBotNetworkHandler(bot: QQAndroidBot) : BotNetworkHandler
                 }
             }
 
+            is Error -> error(response.toString())
+
             is Success -> {
                 bot.logger.info("Login successful")
             }
@@ -207,10 +208,7 @@ internal class QQAndroidBotNetworkHandler(bot: QQAndroidBot) : BotNetworkHandler
     suspend fun <E : Packet> OutgoingPacket.sendAndExpect(): E {
         val handler = PacketListener(commandName = commandName, sequenceId = sequenceId)
         packetListeners.addLast(handler)
-        //println(delegate.readBytes().toUHexString())
-        println("Sending length=" + delegate.remaining)
-        channel.send(delegate)//) { packetListeners.remove(handler); "Cannot send packet" }
-        println("Packet sent")
+        channel.send(delegate)
         @Suppress("UNCHECKED_CAST")
         return handler.await() as E
     }
diff --git a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/login/LoginPacket.kt b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/login/LoginPacket.kt
index 9cbef817c..5a3a5d820 100644
--- a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/login/LoginPacket.kt
+++ b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/login/LoginPacket.kt
@@ -172,6 +172,12 @@ internal object LoginPacket : PacketFactory<LoginPacket.LoginPacketResponse>("wt
 
     sealed class LoginPacketResponse : Packet {
         object Success : LoginPacketResponse()
+        data class Error(
+            val title: String,
+            val message: String,
+            val errorInfo: String
+        ) : LoginPacketResponse()
+
         sealed class Captcha : LoginPacketResponse() {
             class Slider(
                 val data: IoBuffer
@@ -197,52 +203,56 @@ internal object LoginPacket : PacketFactory<LoginPacket.LoginPacketResponse>("wt
         println("subCommand=$subCommand")
         val type = readByte()
         println("type=$type")
-        when (type.toInt()) {
-            0 -> {
-                onLoginSuccess(bot)
-            }
-            1 -> {
-                throw Exception("Wrong Password")
-            }
-            2 -> {
-                onSolveLoginCaptcha(bot)
-            }
+
+        discardExact(2)
+        val tlvMap: Map<Int, ByteArray> = this.readTLVMap()
+        return when (type.toInt()) {
+            0 -> onLoginSuccess(tlvMap, bot)
+            1, 15 -> onErrorMessage(tlvMap)
+            2 -> onSolveLoginCaptcha(tlvMap, bot)
+            else -> error("unknown login result type: $type")
         }
-        if (type.toInt() != 0) {
-            DebugLogger.debug("unknown login result type: $type")
-        }
-        return LoginPacketResponse.Success
+    }
+
+    private fun onErrorMessage(tlvMap: Map<Int, ByteArray>): LoginPacketResponse.Error {
+        return tlvMap[0x146]?.toReadPacket()?.run {
+            readShort() // ver
+            readShort() // code
+
+            val title = readUShortLVString()
+            val message = readUShortLVString()
+            val errorInfo = readUShortLVString()
+
+            LoginPacketResponse.Error(title, message, errorInfo)
+        } ?: error("Cannot find error message")
     }
 
     @UseExperimental(MiraiDebugAPI::class)
-    suspend fun ByteReadPacket.onSolveLoginCaptcha(bot: QQAndroidBot) = this.debugPrint("login验证码解析").run {
+    private suspend fun onSolveLoginCaptcha(tlvMap: Map<Int, ByteArray>, bot: QQAndroidBot): LoginPacketResponse.Captcha {
         val client = bot.client
-        debugDiscardExact(2)
-        val tlvMap: Map<Int, ByteArray> = this.readTLVMap()
-       // val ret = tlvMap[0x104]?.let { println(it.toUHexString()) }
+        // val ret = tlvMap[0x104]?.let { println(it.toUHexString()) }
         println()
         val question = tlvMap[0x165] ?: error("CAPTCHA QUESTION UNKNOWN")
-        when(question[18].toUHexString()){
+        when (question[18].toUHexString()) {
             "36" -> {
                 //图片验证
-                debugPrint("是一个图片验证码")
+                DebugLogger.debug("是一个图片验证码")
                 val imageData = tlvMap[0x165]
                 bot.configuration.captchaSolver.invoke(
                     bot,
-                    (tlvMap[0x165] ?: error("Captcha Image Data Not Found")).toIoBuffer()
+                    (tlvMap[0x105] ?: error("Captcha Image Data Not Found")).toIoBuffer()
                 )
             }
             else -> {
                 error("UNKNOWN CAPTCHA QUESTION: $question")
             }
         }
+        return TODO()
     }
 
     @UseExperimental(MiraiDebugAPI::class)
-    fun ByteReadPacket.onLoginSuccess(bot: QQAndroidBot) = this.debugPrint("login成功解析").run {
+    private fun onLoginSuccess(tlvMap: Map<Int, ByteArray>, bot: QQAndroidBot): LoginPacketResponse.Success {
         val client = bot.client
-        debugDiscardExact(2)
-        val tlvMap: Map<Int, ByteArray> = this.readTLVMap()
         println("TLV KEYS: " + tlvMap.keys.joinToString { it.contentToString() })
 
         tlvMap[0x150]?.let { client.analysisTlv150(it) }
@@ -446,6 +456,7 @@ internal object LoginPacket : PacketFactory<LoginPacket.LoginPacketResponse>("wt
             }
         }
 
+        return LoginPacketResponse.Success
     }
 
 
diff --git a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/BotImpl.kt b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/BotImpl.kt
index 7fae74ff2..7f958fd05 100644
--- a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/BotImpl.kt
+++ b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/BotImpl.kt
@@ -28,7 +28,7 @@ abstract class BotImpl<N : BotNetworkHandler> constructor(
     @UseExperimental(MiraiExperimentalAPI::class)
     final override val uin: Long
         get() = account.id
-    final override val logger: MiraiLogger = configuration.logger ?: DefaultLogger("Bot($uin)")
+    final override val logger: MiraiLogger = configuration.logger ?: DefaultLogger("Bot($uin)").also { configuration.logger = it }
 
     init {
         @Suppress("LeakingThis")
diff --git a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/utils/BotConfiguration.kt b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/utils/BotConfiguration.kt
index 3bc7d89b0..fc18b658b 100644
--- a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/utils/BotConfiguration.kt
+++ b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/utils/BotConfiguration.kt
@@ -4,7 +4,6 @@ import kotlinx.io.core.IoBuffer
 import net.mamoe.mirai.Bot
 import kotlin.coroutines.CoroutineContext
 import kotlin.coroutines.EmptyCoroutineContext
-import kotlin.coroutines.coroutineContext
 import kotlin.jvm.JvmStatic
 
 /**
@@ -26,7 +25,7 @@ class BotConfiguration {
     /**
      * 日志记录器
      */
-    var logger: PlatformLogger? = null
+    var logger: MiraiLogger? = null
 
     /**
      * 父 [CoroutineContext]