diff --git a/go.mod b/go.mod
index 6870d7a..56fecda 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,6 @@ go 1.18
 
 require (
 	github.com/spf13/cobra v1.5.0
-	github.com/xtaci/smux v1.5.16
 )
 
 require (
diff --git a/shadow/client.go b/shadow/client.go
index f194037..72e5aaa 100644
--- a/shadow/client.go
+++ b/shadow/client.go
@@ -59,6 +59,40 @@ func handlerClient(conn net.Conn, serverAddress string, fakeAddressSNI string) {
 	dial.NetConn().SetDeadline(time.Now())
 	dial.NetConn().SetDeadline(time.Time{})
 
-	go io.Copy(conn, dial.NetConn())
-	go io.Copy(dial.NetConn(), conn)
+	p := &PackAppData{Conn: dial.NetConn()}
+
+	go io.Copy(conn, p)
+	go io.Copy(p, conn)
+}
+
+func MyCopy(src io.ReadWriteCloser, dst io.ReadWriteCloser) {
+	buf := make([]byte, 32*1024)
+	for {
+		nr, er := src.Read(buf)
+		if nr > 0 {
+			nw, ew := dst.Write(buf[0:nr])
+			if nw < 0 || nr < nw {
+				nw = 0
+				if ew == nil {
+					fmt.Printf("err1:\n")
+				}
+			}
+			if ew != nil {
+				fmt.Printf("err2:%v\n", ew)
+				break
+			}
+			if nr != nw {
+				fmt.Printf("nr != nw \n")
+				break
+			}
+		}
+		if er != nil {
+			if er != io.EOF {
+				fmt.Printf("err3:%v\n", er)
+			} else {
+				fmt.Println("EOF")
+			}
+			break
+		}
+	}
 }
diff --git a/shadow/client_test.go b/shadow/client_test.go
index 63dc7e4..6dcfef8 100644
--- a/shadow/client_test.go
+++ b/shadow/client_test.go
@@ -23,15 +23,6 @@ func TestName(t *testing.T) {
 }
 
 func TestName2(t *testing.T) {
-	dial, err := tls.DialWithDialer(&net.Dialer{
-		Timeout: time.Second * 5,
-	}, "tcp", "evan.run:443", &tls.Config{
-		ServerName: "evan.run",
-	})
-
-	err = dial.Handshake()
-	if err != nil {
-		fmt.Println(err)
-	}
-	time.Sleep(time.Minute)
+	v := "12345678"
+	fmt.Println(v[2:2])
 }
diff --git a/shadow/packer.go b/shadow/packer.go
new file mode 100644
index 0000000..38bc828
--- /dev/null
+++ b/shadow/packer.go
@@ -0,0 +1,44 @@
+package shadow
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"net"
+)
+
+var (
+	AppDataHeader = []byte{0x17, 0x3, 0x3}
+)
+
+type PackAppData struct {
+	Conn net.Conn
+}
+
+func (m PackAppData) Read(p []byte) (n int, err error) {
+	buf := make([]byte, 32*1024)
+	read, err := m.Conn.Read(buf[0:5])
+	if bytes.Equal(buf[0:3], AppDataHeader) {
+		u := int(binary.BigEndian.Uint16(buf[3:5]))
+		r, err := m.Conn.Read(buf[5 : u+5])
+		copy(p, buf[5:r+5])
+		return r, err
+	} else {
+		fmt.Println("Header is not present")
+		return read, err
+	}
+}
+
+func (m PackAppData) Write(p []byte) (n int, err error) {
+	t := make([]byte, len(p)+5)
+	copy(t[0:], AppDataHeader)
+	binary.BigEndian.PutUint16(t[3:], uint16(len(p)))
+	copy(t[5:], p)
+	write, err := m.Conn.Write(t)
+	write = write - 5
+	return write, err
+}
+
+func (m PackAppData) Close() error {
+	return m.Conn.Close()
+}
diff --git a/shadow/server.go b/shadow/server.go
index e7aefe9..4f7d9f0 100644
--- a/shadow/server.go
+++ b/shadow/server.go
@@ -68,8 +68,10 @@ func handler(conn net.Conn, targetAddress string, fakeAddress string) {
 	if err != nil {
 		return
 	}
-	go io.Copy(realConnection, conn)
-	go io.Copy(conn, realConnection)
+
+	p := &PackAppData{Conn: conn}
+	go io.Copy(realConnection, p)
+	go io.Copy(p, realConnection)
 }
 
 func processHandshake(src net.Conn, dst net.Conn, waitCh chan int) {