diff --git a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/io/JceInput.kt b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/io/JceInput.kt
index c1b790589..b778ecbac 100644
--- a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/io/JceInput.kt
+++ b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/io/JceInput.kt
@@ -3,6 +3,7 @@ package net.mamoe.mirai.qqandroid.network.io
 import kotlinx.io.charsets.Charset
 import kotlinx.io.core.*
 import kotlinx.io.pool.ObjectPool
+import net.mamoe.mirai.utils.io.readIoBuffer
 import net.mamoe.mirai.utils.io.readString
 import net.mamoe.mirai.utils.io.toIoBuffer
 
@@ -20,6 +21,8 @@ inline class JceHead(private val value: Long) {
 
 fun ByteArray.asJceInput(charset: Charset = CharsetGBK): JceInput = JceInput(this.toIoBuffer(), charset)
 
+fun ByteReadPacket.asJceInput(charset: Charset = CharsetGBK): JceInput = JceInput(this.readIoBuffer(), charset)
+
 @Suppress("MemberVisibilityCanBePrivate")
 @UseExperimental(ExperimentalUnsignedTypes::class)
 class JceInput(
diff --git a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/io/JceOutput.kt b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/io/JceOutput.kt
index d55b49a1b..3e12d45fd 100644
--- a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/io/JceOutput.kt
+++ b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/io/JceOutput.kt
@@ -7,6 +7,8 @@ import kotlin.reflect.KClass
 
 @PublishedApi
 internal val CharsetGBK = Charset.forName("GBK")
+@PublishedApi
+internal val CharsetUTF8 = Charset.forName("UTF8")
 
 inline fun buildJcePacket(stringCharset: Charset = CharsetGBK, block: JceOutput.() -> Unit): ByteReadPacket {
     return JceOutput(stringCharset).apply(block).build()