diff --git a/dtmcli/dtmimp/trans_xa_base.go b/dtmcli/dtmimp/trans_xa_base.go
index 95a8811d1..cc7e6047e 100644
--- a/dtmcli/dtmimp/trans_xa_base.go
+++ b/dtmcli/dtmimp/trans_xa_base.go
@@ -11,7 +11,7 @@ import (
 	"strings"
 )
 
-// XaClientBase XaClient/XaGrpcClient base
+// XaClientBase XaClient/XaGrpcClient base. shared by http and grpc
 type XaClientBase struct {
 	Server    string
 	Conf      DBConf