diff --git a/x2paddle/op_mapper/onnx2paddle/opset9/opset.py b/x2paddle/op_mapper/onnx2paddle/opset9/opset.py
index 9c02f344a7ac21cd573ca7283d1ea96f1059ecfb..e7c2b8572d1a765dc1c194ff26714df1e82f4646 100755
--- a/x2paddle/op_mapper/onnx2paddle/opset9/opset.py
+++ b/x2paddle/op_mapper/onnx2paddle/opset9/opset.py
@@ -188,6 +188,7 @@ class OpSet9():
         self.nn_name2id = dict()
         self.done_weight_list = list()
         # solve for same data is used as an argument to multiple OPs.
+        # PR link(wangjunjie06): https://github.com/PaddlePaddle/X2Paddle/pull/728
         self.rename_mapper = dict()
 
     @print_mapping_info