diff --git a/binary/jce/reader.go b/binary/jce/reader.go
index 3c6d5614..7d2f0a7e 100644
--- a/binary/jce/reader.go
+++ b/binary/jce/reader.go
@@ -90,6 +90,9 @@ func (r *JceReader) SkipField(c int) {
 }
 
 func (r *JceReader) readBytes(len int) []byte {
+	if len == 0 {
+		return nil
+	}
 	b := make([]byte, len)
 	_, err := r.buf.Read(b)
 	if err != nil {
diff --git a/client/online_push.go b/client/online_push.go
index b85848a5..1eec697f 100644
--- a/client/online_push.go
+++ b/client/online_push.go
@@ -113,8 +113,8 @@ func decodeOnlinePushReqPacket(c *QQClient, info *incomingPacketInfo, payload []
 		if m.MsgType == 528 {
 			vr := jce.NewJceReader(m.VMsg)
 			subType := vr.ReadInt64(0)
-			protobuf := vr.ReadBytes(10)
 			if decoder, ok := msg0x210Decoders[subType]; ok {
+				protobuf := vr.ReadBytes(10)
 				if err := decoder(c, protobuf); err != nil {
 					return nil, errors.Wrap(err, "decode online push 0x210 error")
 				}