diff --git a/adapter/outbound/base.go b/adapter/outbound/base.go
index 03e9e6ca..e0efe595 100644
--- a/adapter/outbound/base.go
+++ b/adapter/outbound/base.go
@@ -7,12 +7,11 @@ import (
 	"net"
 	"strings"
 
+	N "github.com/Dreamacro/clash/common/net"
 	"github.com/Dreamacro/clash/component/dialer"
 	C "github.com/Dreamacro/clash/constant"
 
 	"github.com/gofrs/uuid"
-	"github.com/sagernet/sing/common/bufio"
-	"github.com/sagernet/sing/common/network"
 )
 
 type Base struct {
@@ -169,7 +168,7 @@ func NewBase(opt BaseOption) *Base {
 }
 
 type conn struct {
-	network.ExtendedConn
+	N.ExtendedConn
 	chain                   C.Chain
 	actualRemoteDestination string
 }
@@ -189,14 +188,14 @@ func (c *conn) AppendToChains(a C.ProxyAdapter) {
 }
 
 func (c *conn) Upstream() any {
-	if wrapper, ok := c.ExtendedConn.(*bufio.ExtendedConnWrapper); ok {
+	if wrapper, ok := c.ExtendedConn.(*N.ExtendedConnWrapper); ok {
 		return wrapper.Conn
 	}
 	return c.ExtendedConn
 }
 
 func NewConn(c net.Conn, a C.ProxyAdapter) C.Conn {
-	return &conn{bufio.NewExtendedConn(c), []string{a.Name()}, parseRemoteDestination(a.Addr())}
+	return &conn{N.NewExtendedConn(c), []string{a.Name()}, parseRemoteDestination(a.Addr())}
 }
 
 type packetConn struct {
diff --git a/adapter/outbound/trojan.go b/adapter/outbound/trojan.go
index a36f5f57..c90ee377 100644
--- a/adapter/outbound/trojan.go
+++ b/adapter/outbound/trojan.go
@@ -8,14 +8,13 @@ import (
 	"net/http"
 	"strconv"
 
+	N "github.com/Dreamacro/clash/common/net"
 	"github.com/Dreamacro/clash/component/dialer"
 	tlsC "github.com/Dreamacro/clash/component/tls"
 	C "github.com/Dreamacro/clash/constant"
 	"github.com/Dreamacro/clash/transport/gun"
 	"github.com/Dreamacro/clash/transport/trojan"
 	"github.com/Dreamacro/clash/transport/vless"
-
-	"github.com/sagernet/sing/common/bufio"
 )
 
 type Trojan struct {
@@ -97,7 +96,7 @@ func (t *Trojan) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error)
 		return c, err
 	}
 	err = t.instance.WriteHeader(c, trojan.CommandTCP, serializesSocksAddr(metadata))
-	return bufio.NewExtendedConn(c), err
+	return N.NewExtendedConn(c), err
 }
 
 // DialContext implements C.ProxyAdapter
diff --git a/common/buf/sing.go b/common/buf/sing.go
new file mode 100644
index 00000000..b5e015f5
--- /dev/null
+++ b/common/buf/sing.go
@@ -0,0 +1,19 @@
+package buf
+
+import (
+	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing/common/buf"
+)
+
+type Buffer = buf.Buffer
+
+var StackNewSize = buf.StackNewSize
+var KeepAlive = common.KeepAlive
+
+//go:norace
+func Dup[T any](obj T) T {
+	return common.Dup(obj)
+}
+
+var Must = common.Must
+var Error = common.Error
diff --git a/common/net/bufconn.go b/common/net/bufconn.go
index bcac11d3..b3e3d1f3 100644
--- a/common/net/bufconn.go
+++ b/common/net/bufconn.go
@@ -4,23 +4,21 @@ import (
 	"bufio"
 	"net"
 
-	"github.com/sagernet/sing/common/buf"
-	sing_bufio "github.com/sagernet/sing/common/bufio"
-	"github.com/sagernet/sing/common/network"
+	"github.com/Dreamacro/clash/common/buf"
 )
 
-var _ network.ExtendedConn = (*BufferedConn)(nil)
+var _ ExtendedConn = (*BufferedConn)(nil)
 
 type BufferedConn struct {
 	r *bufio.Reader
-	network.ExtendedConn
+	ExtendedConn
 }
 
 func NewBufferedConn(c net.Conn) *BufferedConn {
 	if bc, ok := c.(*BufferedConn); ok {
 		return bc
 	}
-	return &BufferedConn{bufio.NewReader(c), sing_bufio.NewExtendedConn(c)}
+	return &BufferedConn{bufio.NewReader(c), NewExtendedConn(c)}
 }
 
 // Reader returns the internal bufio.Reader.
@@ -58,7 +56,7 @@ func (c *BufferedConn) ReadBuffer(buffer *buf.Buffer) (err error) {
 }
 
 func (c *BufferedConn) Upstream() any {
-	if wrapper, ok := c.ExtendedConn.(*sing_bufio.ExtendedConnWrapper); ok {
+	if wrapper, ok := c.ExtendedConn.(*ExtendedConnWrapper); ok {
 		return wrapper.Conn
 	}
 	return c.ExtendedConn
diff --git a/common/net/relay.go b/common/net/relay.go
index d4edede2..6191e76b 100644
--- a/common/net/relay.go
+++ b/common/net/relay.go
@@ -1,24 +1,24 @@
 package net
 
-import (
-	"io"
-	"net"
-	"time"
-)
-
-// Relay copies between left and right bidirectionally.
-func Relay(leftConn, rightConn net.Conn) {
-	ch := make(chan error)
-
-	go func() {
-		// Wrapping to avoid using *net.TCPConn.(ReadFrom)
-		// See also https://github.com/Dreamacro/clash/pull/1209
-		_, err := io.Copy(WriteOnlyWriter{Writer: leftConn}, ReadOnlyReader{Reader: rightConn})
-		leftConn.SetReadDeadline(time.Now())
-		ch <- err
-	}()
-
-	_, _ = io.Copy(WriteOnlyWriter{Writer: rightConn}, ReadOnlyReader{Reader: leftConn})
-	rightConn.SetReadDeadline(time.Now())
-	<-ch
-}
+//import (
+//	"io"
+//	"net"
+//	"time"
+//)
+//
+//// Relay copies between left and right bidirectionally.
+//func Relay(leftConn, rightConn net.Conn) {
+//	ch := make(chan error)
+//
+//	go func() {
+//		// Wrapping to avoid using *net.TCPConn.(ReadFrom)
+//		// See also https://github.com/Dreamacro/clash/pull/1209
+//		_, err := io.Copy(WriteOnlyWriter{Writer: leftConn}, ReadOnlyReader{Reader: rightConn})
+//		leftConn.SetReadDeadline(time.Now())
+//		ch <- err
+//	}()
+//
+//	_, _ = io.Copy(WriteOnlyWriter{Writer: rightConn}, ReadOnlyReader{Reader: leftConn})
+//	rightConn.SetReadDeadline(time.Now())
+//	<-ch
+//}
diff --git a/common/net/sing.go b/common/net/sing.go
new file mode 100644
index 00000000..37ba3f0c
--- /dev/null
+++ b/common/net/sing.go
@@ -0,0 +1,24 @@
+package net
+
+import (
+	"context"
+	"net"
+
+	"github.com/sagernet/sing/common/bufio"
+	"github.com/sagernet/sing/common/network"
+)
+
+type ExtendedConnWrapper = bufio.ExtendedConnWrapper
+
+var NewExtendedConn = bufio.NewExtendedConn
+var NewExtendedWriter = bufio.NewExtendedWriter
+var NewExtendedReader = bufio.NewExtendedReader
+
+type ExtendedConn = network.ExtendedConn
+type ExtendedWriter = network.ExtendedWriter
+type ExtendedReader = network.ExtendedReader
+
+// Relay copies between left and right bidirectionally.
+func Relay(leftConn, rightConn net.Conn) {
+	_ = bufio.CopyConn(context.TODO(), leftConn, rightConn)
+}
diff --git a/transport/vless/conn.go b/transport/vless/conn.go
index 72d14d0c..d57f3ae1 100644
--- a/transport/vless/conn.go
+++ b/transport/vless/conn.go
@@ -7,17 +7,16 @@ import (
 	"io"
 	"net"
 
+	"github.com/Dreamacro/clash/common/buf"
+	N "github.com/Dreamacro/clash/common/net"
+
 	"github.com/gofrs/uuid"
-	"github.com/sagernet/sing/common"
-	"github.com/sagernet/sing/common/buf"
-	"github.com/sagernet/sing/common/bufio"
-	"github.com/sagernet/sing/common/network"
 	xtls "github.com/xtls/go"
 	"google.golang.org/protobuf/proto"
 )
 
 type Conn struct {
-	network.ExtendedConn
+	N.ExtendedConn
 	dst      *DstAddr
 	id       *uuid.UUID
 	addons   *Addons
@@ -67,30 +66,30 @@ func (vc *Conn) sendRequest() (err error) {
 		requestLen += len(vc.dst.Addr)
 	}
 	_buffer := buf.StackNewSize(requestLen)
-	defer common.KeepAlive(_buffer)
-	buffer := common.Dup(_buffer)
+	defer buf.KeepAlive(_buffer)
+	buffer := buf.Dup(_buffer)
 	defer buffer.Release()
 
-	common.Must(
-		buffer.WriteByte(Version),                 // protocol version
-		common.Error(buffer.Write(vc.id.Bytes())), // 16 bytes of uuid
+	buf.Must(
+		buffer.WriteByte(Version),              // protocol version
+		buf.Error(buffer.Write(vc.id.Bytes())), // 16 bytes of uuid
 		buffer.WriteByte(byte(len(addonsBytes))),
-		common.Error(buffer.Write(addonsBytes)),
+		buf.Error(buffer.Write(addonsBytes)),
 	)
 
 	if vc.dst.Mux {
-		common.Must(buffer.WriteByte(CommandMux))
+		buf.Must(buffer.WriteByte(CommandMux))
 	} else {
 		if vc.dst.UDP {
-			common.Must(buffer.WriteByte(CommandUDP))
+			buf.Must(buffer.WriteByte(CommandUDP))
 		} else {
-			common.Must(buffer.WriteByte(CommandTCP))
+			buf.Must(buffer.WriteByte(CommandTCP))
 		}
 
 		binary.BigEndian.PutUint16(buffer.Extend(2), vc.dst.Port)
-		common.Must(
+		buf.Must(
 			buffer.WriteByte(vc.dst.AddrType),
-			common.Error(buffer.Write(vc.dst.Addr)),
+			buf.Error(buffer.Write(vc.dst.Addr)),
 		)
 	}
 
@@ -124,7 +123,7 @@ func (vc *Conn) recvResponse() error {
 }
 
 func (vc *Conn) Upstream() any {
-	if wrapper, ok := vc.ExtendedConn.(*bufio.ExtendedConnWrapper); ok {
+	if wrapper, ok := vc.ExtendedConn.(*N.ExtendedConnWrapper); ok {
 		return wrapper.Conn
 	}
 	return vc.ExtendedConn
@@ -133,7 +132,7 @@ func (vc *Conn) Upstream() any {
 // newConn return a Conn instance
 func newConn(conn net.Conn, client *Client, dst *DstAddr) (*Conn, error) {
 	c := &Conn{
-		ExtendedConn: bufio.NewExtendedConn(conn),
+		ExtendedConn: N.NewExtendedConn(conn),
 		id:           client.uuid,
 		dst:          dst,
 	}
diff --git a/transport/vmess/websocket.go b/transport/vmess/websocket.go
index 735ea7f2..ce5615d5 100644
--- a/transport/vmess/websocket.go
+++ b/transport/vmess/websocket.go
@@ -19,10 +19,10 @@ import (
 	"time"
 	_ "unsafe"
 
+	"github.com/Dreamacro/clash/common/buf"
+	N "github.com/Dreamacro/clash/common/net"
+
 	"github.com/gorilla/websocket"
-	"github.com/sagernet/sing/common/buf"
-	"github.com/sagernet/sing/common/bufio"
-	"github.com/sagernet/sing/common/network"
 )
 
 //go:linkname maskBytes github.com/gorilla/websocket.maskBytes
@@ -33,7 +33,7 @@ type websocketConn struct {
 	reader     io.Reader
 	remoteAddr net.Addr
 
-	rawWriter network.ExtendedWriter
+	rawWriter N.ExtendedWriter
 
 	// https://godoc.org/github.com/gorilla/websocket#hdr-Concurrency
 	rMux sync.Mutex
@@ -42,7 +42,7 @@ type websocketConn struct {
 
 type websocketWithEarlyDataConn struct {
 	net.Conn
-	wsWriter network.ExtendedWriter
+	wsWriter N.ExtendedWriter
 	underlay net.Conn
 	closed   bool
 	dialed   chan bool
@@ -209,7 +209,7 @@ func (wsedc *websocketWithEarlyDataConn) Dial(earlyData []byte) error {
 	}
 
 	wsedc.dialed <- true
-	wsedc.wsWriter = bufio.NewExtendedWriter(wsedc.Conn)
+	wsedc.wsWriter = N.NewExtendedWriter(wsedc.Conn)
 	if earlyDataBuf.Len() != 0 {
 		_, err = wsedc.Conn.Write(earlyDataBuf.Bytes())
 	}
@@ -373,7 +373,7 @@ func streamWebsocketConn(conn net.Conn, c *WebsocketConfig, earlyData *bytes.Buf
 
 	return &websocketConn{
 		conn:       wsConn,
-		rawWriter:  bufio.NewExtendedWriter(wsConn.UnderlyingConn()),
+		rawWriter:  N.NewExtendedWriter(wsConn.UnderlyingConn()),
 		remoteAddr: conn.RemoteAddr(),
 	}, nil
 }
diff --git a/tunnel/connection.go b/tunnel/connection.go
index 1747597e..c63bab78 100644
--- a/tunnel/connection.go
+++ b/tunnel/connection.go
@@ -1,16 +1,14 @@
 package tunnel
 
 import (
-	"context"
 	"errors"
 	"net"
 	"net/netip"
 	"time"
 
+	N "github.com/Dreamacro/clash/common/net"
 	"github.com/Dreamacro/clash/common/pool"
 	C "github.com/Dreamacro/clash/constant"
-
-	"github.com/sagernet/sing/common/bufio"
 )
 
 func handleUDPToRemote(packet C.UDPPacket, pc C.PacketConn, metadata *C.Metadata) error {
@@ -62,5 +60,5 @@ func handleUDPToLocal(packet C.UDPPacket, pc net.PacketConn, key string, oAddr,
 }
 
 func handleSocket(ctx C.ConnContext, outbound net.Conn) {
-	bufio.CopyConn(context.TODO(), ctx.Conn(), outbound)
+	N.Relay(ctx.Conn(), outbound)
 }
diff --git a/tunnel/statistic/tracker.go b/tunnel/statistic/tracker.go
index 32d44f0c..c034d75d 100644
--- a/tunnel/statistic/tracker.go
+++ b/tunnel/statistic/tracker.go
@@ -4,12 +4,11 @@ import (
 	"net"
 	"time"
 
+	"github.com/Dreamacro/clash/common/buf"
+	N "github.com/Dreamacro/clash/common/net"
 	C "github.com/Dreamacro/clash/constant"
 
 	"github.com/gofrs/uuid"
-	"github.com/sagernet/sing/common/buf"
-	"github.com/sagernet/sing/common/bufio"
-	"github.com/sagernet/sing/common/network"
 	"go.uber.org/atomic"
 )
 
@@ -33,8 +32,8 @@ type tcpTracker struct {
 	C.Conn `json:"-"`
 	*trackerInfo
 	manager        *Manager
-	extendedReader network.ExtendedReader
-	extendedWriter network.ExtendedWriter
+	extendedReader N.ExtendedReader
+	extendedWriter N.ExtendedWriter
 }
 
 func (tt *tcpTracker) ID() string {
@@ -107,8 +106,8 @@ func NewTCPTracker(conn C.Conn, manager *Manager, metadata *C.Metadata, rule C.R
 			UploadTotal:   atomic.NewInt64(0),
 			DownloadTotal: atomic.NewInt64(0),
 		},
-		extendedReader: bufio.NewExtendedReader(conn),
-		extendedWriter: bufio.NewExtendedWriter(conn),
+		extendedReader: N.NewExtendedReader(conn),
+		extendedWriter: N.NewExtendedWriter(conn),
 	}
 
 	if rule != nil {