diff --git a/binary/jce/reader.go b/binary/jce/reader.go
index eff8e1dc..9fd750d1 100644
--- a/binary/jce/reader.go
+++ b/binary/jce/reader.go
@@ -46,7 +46,6 @@ func (r *JceReader) skipHead() {
 		l = 2
 	}
 	r.off += l
-	return
 }
 
 func (r *JceReader) skip(l int) {
diff --git a/binary/jce/structs.go b/binary/jce/structs.go
index 65ecc6e9..1cb644e2 100644
--- a/binary/jce/structs.go
+++ b/binary/jce/structs.go
@@ -546,9 +546,6 @@ func (pkt *RequestPacket) ToBytes() []byte {
 }
 
 func (pkt *RequestPacket) ReadFrom(r *JceReader) {
-	pkt.SBuffer = []byte{}
-	pkt.Context = make(map[string]string)
-	pkt.Status = make(map[string]string)
 	pkt.IVersion = r.ReadInt16(1)
 	pkt.CPacketType = r.ReadByte(2)
 	pkt.IMessageType = r.ReadInt32(3)
@@ -596,9 +593,9 @@ func (pkt *FileStoragePushFSSvcList) ReadFrom(r *JceReader) {
 	pkt.QZoneProxyServiceList = r.ReadFileStorageServerInfos(3)
 	pkt.UrlEncodeServiceList = r.ReadFileStorageServerInfos(4)
 	pkt.BigDataChannel = &BigDataChannel{}
-	pkt.VipEmotionList = r.ReadFileStorageServerInfos(5)
-	pkt.C2CPicDownList = r.ReadFileStorageServerInfos(7)
 	r.ReadJceStruct(pkt.BigDataChannel, 5)
+	pkt.VipEmotionList = r.ReadFileStorageServerInfos(6)
+	pkt.C2CPicDownList = r.ReadFileStorageServerInfos(7)
 	pkt.PttList = r.ReadBytes(10)
 }
 
diff --git a/binary/tea.go b/binary/tea.go
index a0bdff4c..455933f2 100644
--- a/binary/tea.go
+++ b/binary/tea.go
@@ -7,9 +7,9 @@ import (
 
 type TEA [4]uint32
 
-// Uint32 returns a lock free uint32 value.
-//go:linkname Uint32 runtime.fastrand
-func Uint32() uint32
+// randuint32 returns a lock free uint32 value.
+//go:linkname randuint32 runtime.fastrand
+func randuint32() uint32
 
 // Encrypt tea 加密
 // http://bbs.chinaunix.net/thread-583468-1-1.html
@@ -18,9 +18,9 @@ func (t TEA) Encrypt(src []byte) (dst []byte) {
 	lens := len(src)
 	fill := 10 - (lens+1)%8
 	dst = make([]byte, fill+lens+7)
-	binary.LittleEndian.PutUint32(dst, Uint32())
-	binary.LittleEndian.PutUint32(dst[4:], Uint32())
-	binary.LittleEndian.PutUint32(dst[8:], Uint32())
+	binary.LittleEndian.PutUint32(dst, randuint32())
+	binary.LittleEndian.PutUint32(dst[4:], randuint32())
+	binary.LittleEndian.PutUint32(dst[8:], randuint32())
 	dst[0] = byte(fill-3) | 0xF8 // 存储pad长度
 	copy(dst[fill:], src)
 
diff --git a/binary/writer.go b/binary/writer.go
index de7d55f5..19642c81 100644
--- a/binary/writer.go
+++ b/binary/writer.go
@@ -19,10 +19,9 @@ func NewWriterF(f func(writer *Writer)) []byte {
 	return b
 }
 
-// OpenWriterF must call func close
-func OpenWriterF(f func(writer *Writer)) (b []byte, close func()) {
+// OpenWriterF must call func cl to close
+func OpenWriterF(f func(*Writer)) (b []byte, cl func()) {
 	w := SelectWriter()
-	w.WriteByte(0)
 	f(w)
 	return w.Bytes(), func() { PutWriter(w) }
 }
@@ -80,11 +79,11 @@ func (w *Writer) EncryptAndWrite(key []byte, data []byte) {
 	w.Write(NewTeaCipher(key).Encrypt(data))
 }
 
-func (w *Writer) WriteIntLvPacket(offset int, f func(writer *Writer)) {
-	data, close := OpenWriterF(f)
+func (w *Writer) WriteIntLvPacket(offset int, f func(*Writer)) {
+	data, cl := OpenWriterF(f)
 	w.WriteUInt32(uint32(len(data) + offset))
 	w.Write(data)
-	close()
+	cl()
 }
 
 func (w *Writer) WriteUniPacket(commandName string, sessionId, extraData, body []byte) {
diff --git a/client/builders.go b/client/builders.go
index a1c8b1ad..739dcfdc 100644
--- a/client/builders.go
+++ b/client/builders.go
@@ -169,9 +169,9 @@ func (c *QQClient) buildQRCodeLoginPacket(t106, t16a, t318 []byte) (uint16, []by
 
 		w.Write(tlv.T18(16, uint32(c.Uin)))
 		w.Write(tlv.T1(uint32(c.Uin), c.deviceInfo.IpAddress))
-		wb, cl := binary.OpenWriterF(func(w *binary.Writer) {
-			w.WriteUInt16(0x106)
-			w.WriteBytesShort(t106)
+		wb, cl := binary.OpenWriterF(func(bw *binary.Writer) {
+			bw.WriteUInt16(0x106)
+			bw.WriteBytesShort(t106)
 		})
 		w.Write(wb)
 		cl()
@@ -196,9 +196,9 @@ func (c *QQClient) buildQRCodeLoginPacket(t106, t16a, t318 []byte) (uint16, []by
 
 		w.Write(tlv.T145(c.deviceInfo.Guid))
 		w.Write(tlv.T147(16, []byte(c.version.SortVersionName), c.version.ApkSign))
-		wb, cl = binary.OpenWriterF(func(w *binary.Writer) {
-			w.WriteUInt16(0x16A)
-			w.WriteBytesShort(t16a)
+		wb, cl = binary.OpenWriterF(func(bw *binary.Writer) {
+			bw.WriteUInt16(0x16A)
+			bw.WriteBytesShort(t16a)
 		})
 		w.Write(wb)
 		cl()
@@ -223,9 +223,9 @@ func (c *QQClient) buildQRCodeLoginPacket(t106, t16a, t318 []byte) (uint16, []by
 		w.Write(tlv.T516())
 		w.Write(tlv.T521(8))
 		// w.Write(tlv.T525(tlv.T536([]byte{0x01, 0x00})))
-		wb, cl = binary.OpenWriterF(func(w *binary.Writer) {
-			w.WriteUInt16(0x318)
-			w.WriteBytesShort(t318)
+		wb, cl = binary.OpenWriterF(func(bw *binary.Writer) {
+			bw.WriteUInt16(0x318)
+			bw.WriteBytesShort(t318)
 		})
 		w.Write(wb)
 		cl()
@@ -312,9 +312,9 @@ func (c *QQClient) buildRequestTgtgtNopicsigPacket() (uint16, []byte) {
 
 		w.Write(tlv.T18(16, uint32(c.Uin)))
 		w.Write(tlv.T1(uint32(c.Uin), c.deviceInfo.IpAddress))
-		wb, cl := binary.OpenWriterF(func(w *binary.Writer) {
-			w.WriteUInt16(0x106)
-			w.WriteBytesShort(c.sigInfo.encryptedA1)
+		wb, cl := binary.OpenWriterF(func(bw *binary.Writer) {
+			bw.WriteUInt16(0x106)
+			bw.WriteBytesShort(c.sigInfo.encryptedA1)
 		})
 		w.Write(wb)
 		cl()