diff --git a/client/builders.go b/client/builders.go
index b1a46b9b..ed0b8dc8 100644
--- a/client/builders.go
+++ b/client/builders.go
@@ -203,7 +203,7 @@ func (c *QQClient) buildFriendGroupListRequestPacket(friendStartIndex, friendLis
 	})
 	req := &jce.FriendListRequest{
 		Reqtype: 3,
-		IfReflush: func() byte { // fuck golang
+		IfReflush: func() byte {
 			if friendStartIndex <= 0 {
 				return 0
 			}
@@ -996,6 +996,7 @@ func (c *QQClient) buildGroupFileDownloadReqPacket(groupCode int64, fileId strin
 	return seq, packet
 }
 
+// PttCenterSvr.ShortVideoDownReq
 func (c *QQClient) buildPttShortVideoDownReqPacket(uuid, md5 []byte) (uint16, []byte) {
 	seq := c.nextSeq()
 	body := &pttcenter.ShortVideoReqBody{
diff --git a/client/client.go b/client/client.go
index 4bd9342f..5d92fdba 100644
--- a/client/client.go
+++ b/client/client.go
@@ -542,10 +542,20 @@ func (c *QQClient) QueryFriendImage(target int64, hash []byte, size int32) (*mes
 	}, nil
 }
 
-func (c *QQClient) ReloadGroupList() error {
+func (c *QQClient) ReloadGroupList(async ...bool) error {
+	f := false
+	if len(async) > 0 {
+		f = async[0]
+	}
 	c.groupListLock.Lock()
 	defer c.groupListLock.Unlock()
-	list, err := c.GetGroupList()
+	list, err := func() ([]*GroupInfo, error) {
+		if f {
+			return c.GetGroupListAsync()
+		} else {
+			return c.GetGroupList()
+		}
+	}()
 	if err != nil {
 		return err
 	}
@@ -569,6 +579,25 @@ func (c *QQClient) GetGroupList() ([]*GroupInfo, error) {
 	return r, nil
 }
 
+func (c *QQClient) GetGroupListAsync() ([]*GroupInfo, error) {
+	rsp, err := c.sendAndWait(c.buildGroupListRequestPacket())
+	if err != nil {
+		return nil, err
+	}
+	r := rsp.([]*GroupInfo)
+	for _, group := range r {
+		g := group
+		go func() {
+			m, err := c.GetGroupMembers(g)
+			if err != nil {
+				return
+			}
+			g.Members = m
+		}()
+	}
+	return r, nil
+}
+
 func (c *QQClient) GetGroupMembers(group *GroupInfo) ([]*GroupMemberInfo, error) {
 	var nextUin int64
 	var list []*GroupMemberInfo
@@ -795,14 +824,23 @@ func (c *QQClient) sendAndWait(seq uint16, pkt []byte) (interface{}, error) {
 			Error:    err,
 		}
 	})
-	select {
-	case rsp := <-ch:
-		return rsp.Response, rsp.Error
-	case <-time.After(time.Second * 15):
-		c.handlers.Delete(seq)
-		println("Packet Timed out")
-		return nil, errors.New("time out")
+	retry := 0
+	for true {
+		select {
+		case rsp := <-ch:
+			return rsp.Response, rsp.Error
+		case <-time.After(time.Second * 15):
+			retry++
+			if retry < 2 {
+				_ = c.send(pkt)
+				continue
+			}
+			c.handlers.Delete(seq)
+			println("Packet Timed out")
+			return nil, errors.New("time out")
+		}
 	}
+	return nil, nil
 }
 
 func (c *QQClient) netLoop() {
@@ -840,7 +878,7 @@ func (c *QQClient) netLoop() {
 			}
 		}
 		retry = 0
-		//fmt.Println(pkt.CommandName)
+		//fmt.Println(pkt.CommandName, pkt.SequenceId)
 		go func() {
 			defer func() {
 				if pan := recover(); pan != nil {
diff --git a/client/decoders.go b/client/decoders.go
index 1128d39e..c18242a3 100644
--- a/client/decoders.go
+++ b/client/decoders.go
@@ -254,10 +254,11 @@ func decodeMessageSvcPacket(c *QQClient, _ uint16, payload []byte) (interface{},
 			}
 		}
 	}
-	_, _ = c.sendAndWait(c.buildDeleteMessageRequestPacket(delItems))
+	_, delPkt := c.buildDeleteMessageRequestPacket(delItems)
+	_ = c.send(delPkt)
 	if rsp.SyncFlag != msg.SyncFlag_STOP {
-		seq, pkt := c.buildGetMessageRequestPacket(rsp.SyncFlag, time.Now().Unix())
-		_, _ = c.sendAndWait(seq, pkt)
+		_, nextPkt := c.buildGetMessageRequestPacket(rsp.SyncFlag, time.Now().Unix())
+		_ = c.send(nextPkt)
 	}
 	return nil, err
 }