diff --git a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/ContactImpl.kt b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/ContactImpl.kt
index e218225b1..3d26048fd 100644
--- a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/ContactImpl.kt
+++ b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/ContactImpl.kt
@@ -26,6 +26,9 @@ internal class QQImpl(bot: QQAndroidBot, override val coroutineContext: Coroutin
         TODO("not implemented")
     }
 
+    override val isOnline: Boolean
+        get() = true
+
     override suspend fun queryProfile(): Profile {
         TODO("not implemented")
     }
@@ -40,11 +43,16 @@ internal class QQImpl(bot: QQAndroidBot, override val coroutineContext: Coroutin
 
 }
 
-internal class MemberImpl(bot: QQAndroidBot, group: Group, override val coroutineContext: CoroutineContext, override val id: Long) : ContactImpl(), Member {
-    override val group: Group by group.unsafeWeakRef()
+internal class MemberImpl(
+    qq: QQImpl,
+    group: GroupImpl,
+    override val coroutineContext: CoroutineContext
+) : ContactImpl(), Member, QQ by qq {
+    override val group: GroupImpl by group.unsafeWeakRef()
+    val qq: QQImpl by qq.unsafeWeakRef()
+
     override val permission: MemberPermission
         get() = TODO("not implemented")
-    override val bot: QQAndroidBot by bot.unsafeWeakRef()
 
     override suspend fun mute(durationSeconds: Int): Boolean {
         TODO("not implemented")
@@ -54,26 +62,6 @@ internal class MemberImpl(bot: QQAndroidBot, group: Group, override val coroutin
         TODO("not implemented")
     }
 
-    override suspend fun queryProfile(): Profile {
-        TODO("not implemented")
-    }
-
-    override suspend fun queryPreviousNameList(): PreviousNameList {
-        TODO("not implemented")
-    }
-
-    override suspend fun queryRemark(): FriendNameRemark {
-        TODO("not implemented")
-    }
-
-    override suspend fun sendMessage(message: MessageChain) {
-        TODO("not implemented")
-    }
-
-    override suspend fun uploadImage(image: ExternalImage): ImageId {
-        TODO("not implemented")
-    }
-
 }
 
 
@@ -89,7 +77,7 @@ internal class GroupImpl(bot: QQAndroidBot, override val coroutineContext: Corou
     override val members: ContactList<Member> = ContactList(LockFreeLinkedList())
 
     override fun getMember(id: Long): Member =
-        members.delegate.filteringGetOrAdd({ it.id == id }, { MemberImpl(bot as QQAndroidBot, this, coroutineContext, id) })
+        members.delegate.filteringGetOrAdd({ it.id == id }, { MemberImpl(bot.getQQ(id) as QQImpl, this, coroutineContext) })
 
     override suspend fun updateGroupInfo(): GroupInfo {
         TODO("not implemented")
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 f3eb44953..b63ec5f14 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
@@ -310,19 +310,33 @@ internal class QQAndroidBotNetworkHandler(bot: QQAndroidBot) : BotNetworkHandler
     /**
      * 发送一个包, 并挂起直到接收到指定的返回包或超时(3000ms)
      */
-    suspend fun <E : Packet> OutgoingPacket.sendAndExpect(timoutMillis: Long = 3000): E {
+    suspend fun <E : Packet> OutgoingPacket.sendAndExpect(timeoutMillis: Long = 3000, retry: Int = 1): E {
+        require(timeoutMillis > 0) { "timeoutMillis must > 0" }
+        require(retry >= 0) { "retry must >= 0" }
+
         val handler = PacketListener(commandName = commandName, sequenceId = sequenceId)
         packetListeners.addLast(handler)
         bot.logger.info("Send: ${this.commandName}")
+        var lastException: Exception? = null
+        repeat(retry + 1) {
+            try {
+                return doSendAndReceive(timeoutMillis, handler)
+            } catch (e: Exception) {
+                lastException = e
+            }
+        }
+        throw lastException!!
+    }
+
+    private suspend inline fun <E : Packet> OutgoingPacket.doSendAndReceive(timeoutMillis: Long = 3000, handler: PacketListener): E {
         channel.send(delegate)
-        return withTimeoutOrNull(timoutMillis) {
+        return withTimeoutOrNull(timeoutMillis) {
             @Suppress("UNCHECKED_CAST")
             handler.await() as E
-
             // 不要 `withTimeout`. timeout 的异常会不知道去哪了.
         } ?: net.mamoe.mirai.qqandroid.utils.inline {
             packetListeners.remove(handler)
-            error("timeout when sending ${commandName}")
+            error("timeout when sending $commandName")
         }
     }
 
diff --git a/mirai-core-timpc/src/commonMain/kotlin/net.mamoe.mirai.timpc/network/ContactImpl.kt b/mirai-core-timpc/src/commonMain/kotlin/net.mamoe.mirai.timpc/network/ContactImpl.kt
index b648de090..dcf769fe9 100644
--- a/mirai-core-timpc/src/commonMain/kotlin/net.mamoe.mirai.timpc/network/ContactImpl.kt
+++ b/mirai-core-timpc/src/commonMain/kotlin/net.mamoe.mirai.timpc/network/ContactImpl.kt
@@ -139,6 +139,9 @@ internal class QQImpl @PublishedApi internal constructor(bot: TIMPCBot, override
         }
     }
 
+    override val isOnline: Boolean
+        get() = true
+
     override suspend fun queryProfile(): Profile = withTIMPCBot {
         RequestProfileDetailsPacket(bot.uin, id, sessionKey).sendAndExpect<RequestProfileDetailsResponse>().profile
     }
diff --git a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/contact/Member.kt b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/contact/Member.kt
index 7fea786a3..b7f8b823f 100644
--- a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/contact/Member.kt
+++ b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/contact/Member.kt
@@ -13,6 +13,7 @@ interface Member : QQ, Contact {
     /**
      * 所在的群
      */
+    @WeakRefProperty
     val group: Group
 
     /**