diff --git a/gold/link/link.go b/gold/link/link.go
index 382f002..7e8813b 100644
--- a/gold/link/link.go
+++ b/gold/link/link.go
@@ -82,13 +82,15 @@ func (l *Link) Write(p *head.Packet, istransfer bool) (n int, err error) {
 		}
 		return l.write(p, uint32(len(p.Data)), 0, istransfer, false)
 	}
-	p.FillHash()
-	p.Data = l.Encode(p.Data)
+	if !istransfer {
+		p.FillHash()
+		p.Data = l.Encode(p.Data)
+	}
 	data := p.Data
 	totl := uint32(len(data))
 	i := 0
 	for ; int(totl)-i > int(l.me.mtu); i += int(l.me.mtu) {
-		logrus.Infoln("[link] split frag", i, ":", i+int(l.me.mtu), ", remain:", int(totl)-i)
+		logrus.Infoln("[link] split frag", i, ":", i+int(l.me.mtu), ", remain:", int(totl)-i-int(l.me.mtu))
 		packet := *p
 		packet.Data = data[:int(l.me.mtu)]
 		cnt, err := l.write(&packet, totl, uint16(i), istransfer, true)
@@ -110,7 +112,7 @@ func (l *Link) Write(p *head.Packet, istransfer bool) (n int, err error) {
 func (l *Link) String() (n string) {
 	n = "default"
 	if l.pubk != nil {
-		b, err := base14.UTF16be2utf8(base14.Encode(l.pubk[:10]))
+		b, err := base14.UTF16be2utf8(base14.Encode(l.pubk[:7]))
 		if err == nil {
 			n = helper.BytesToString(b)
 		} else {
diff --git a/gold/link/recv.go b/gold/link/recv.go
index f1ac2e1..407bb05 100644
--- a/gold/link/recv.go
+++ b/gold/link/recv.go
@@ -2,6 +2,7 @@ package link
 
 import (
 	"encoding/binary"
+	"encoding/hex"
 	"time"
 	"unsafe"
 
@@ -54,6 +55,7 @@ func (m *Me) wait(data []byte) *head.Packet {
 	hsh := *(*[32]byte)(*(*unsafe.Pointer)(unsafe.Pointer(&hashd)))
 	h, ok := m.recving[hsh]
 	if ok {
+		logrus.Infoln("[recv] get another frag part of", hex.EncodeToString(hashd))
 		ok, err := h.Unmarshal(data)
 		if err == nil {
 			if ok {
@@ -65,6 +67,7 @@ func (m *Me) wait(data []byte) *head.Packet {
 		}
 		return nil
 	}
+	logrus.Infoln("[recv] get new frag part of", hex.EncodeToString(hashd))
 	h = &head.Packet{}
 	_, err := h.Unmarshal(data)
 	if err != nil {