diff --git a/int.go b/int.go
index fd97dce..9d21568 100644
--- a/int.go
+++ b/int.go
@@ -35,7 +35,6 @@
 // ::= [x80-xbf]             # -x10 to x3f
 // ::= [xc0-xcf] b0          # -x800 to x7ff
 // ::= [xd0-xd7] b1 b0       # -x40000 to x3ffff
-// hessian-lite/src/main/java/com/alibaba/com/alibaba/com/caucho/hessian/io/Hessian2Output.java:642 WriteInt
 func encInt32(b []byte, v int32) []byte {
 	if int32(INT_DIRECT_MIN) <= v && v <= int32(INT_DIRECT_MAX) {
 		return encByte(b, byte(v+int32(BC_INT_ZERO)))
diff --git a/long.go b/long.go
index df8cb98..d8d2005 100644
--- a/long.go
+++ b/long.go
@@ -36,7 +36,6 @@
 // ::= [xf0-xff] b0          # -x800 to x7ff
 // ::= [x38-x3f] b1 b0       # -x40000 to x3ffff
 // ::= x59 b3 b2 b1 b0       # 32-bit integer cast to long
-// hessian-lite/src/main/java/com/alibaba/com/alibaba/com/caucho/hessian/io/Hessian2Output.java:642 WriteLong
 func encInt64(b []byte, v int64) []byte {
 	if int64(LONG_DIRECT_MIN) <= v && v <= int64(LONG_DIRECT_MAX) {
 		return encByte(b, byte(v+int64(BC_LONG_ZERO)))
diff --git a/request.go b/request.go
index 117ca16..146f961 100644
--- a/request.go
+++ b/request.go
@@ -33,7 +33,6 @@
 // dubbo
 /////////////////////////////////////////
 
-// com.alibaba.dubbo.common.utils.ReflectUtils.ReflectUtils.java line245 getDesc
 func getArgType(v interface{}) string {
 	if v == nil {
 		return "V"
@@ -172,8 +171,6 @@
 	return NewRequest(body, nil)
 }
 
-// dubbo-remoting/dubbo-remoting-api/src/main/java/com/alibaba/dubbo/remoting/exchange/codec/ExchangeCodec.java
-// v2.5.4 line 204 encodeRequest
 func packRequest(service Service, header DubboHeader, req interface{}) ([]byte, error) {
 	var (
 		err       error
@@ -213,7 +210,6 @@
 	encoder := NewEncoder()
 	encoder.Append(byteArray[:HEADER_LENGTH])
 
-	// com.alibaba.dubbo.rpc.protocol.dubbo.DubboCodec.DubboCodec.java line144 encodeRequestData
 	//////////////////////////////////////////
 	// body
 	//////////////////////////////////////////
@@ -222,7 +218,6 @@
 		goto END
 	}
 
-	// https://github.com/apache/dubbo/blob/dubbo-2.7.1/dubbo-remoting/dubbo-remoting-api/src/main/java/org/apache/dubbo/remoting/exchange/support/header/HeaderExchangeChannel.java#L92
 	// dubbo version + path + version + method
 	encoder.Encode(DEFAULT_DUBBO_PROTOCOL_VERSION)
 	encoder.Encode(service.Path)
diff --git a/response.go b/response.go
index e93b580..4ba9e39 100644
--- a/response.go
+++ b/response.go
@@ -96,9 +96,6 @@
 		if hb {
 			encoder.Encode(nil)
 		} else {
-			// com.alibaba.dubbo.rpc.protocol.dubbo.DubboCodec.DubboCodec.java
-			// v2.7.1 line191 encodeResponseData
-
 			atta := isSupportResponseAttachment(response.Attachments[DUBBO_VERSION_KEY])
 
 			var resWithException, resValue, resNullValue int32
@@ -133,8 +130,6 @@
 			}
 		}
 	} else {
-		// com.alibaba.dubbo.remoting.exchange.codec.ExchangeCodec
-		// v2.6.5 line280 encodeResponse
 		if response.Exception != nil { // throw error
 			encoder.Encode(response.Exception.Error())
 		} else {
diff --git a/string.go b/string.go
index abffa66..9737761 100644
--- a/string.go
+++ b/string.go
@@ -250,7 +250,6 @@
 	}
 }
 
-// hessian-lite/src/main/java/com/alibaba/com/caucho/hessian/io/Hessian2Input.java : readString
 func (d *Decoder) decString(flag int32) (string, error) {
 	var (
 		tag       byte