diff --git a/modelscope/models/cv/body_2d_keypoints/hrnet_v2.py b/modelscope/models/cv/body_2d_keypoints/hrnet_v2.py
index 1570c8cc..ebd69adb 100644
--- a/modelscope/models/cv/body_2d_keypoints/hrnet_v2.py
+++ b/modelscope/models/cv/body_2d_keypoints/hrnet_v2.py
@@ -1,3 +1,5 @@
+# The implementation is based on HRNET, available at https://github.com/HRNet/HigherHRNet-Human-Pose-Estimation.
+
 import os
 
 import numpy as np
diff --git a/modelscope/models/cv/body_2d_keypoints/w48.py b/modelscope/models/cv/body_2d_keypoints/w48.py
index 7140f8fe..e0317991 100644
--- a/modelscope/models/cv/body_2d_keypoints/w48.py
+++ b/modelscope/models/cv/body_2d_keypoints/w48.py
@@ -1,3 +1,5 @@
+# The implementation is based on HRNET, available at https://github.com/HRNet/HigherHRNet-Human-Pose-Estimation.
+
 cfg_128x128_15 = {
     'DATASET': {
         'TYPE': 'DAMO',
diff --git a/modelscope/pipelines/cv/body_2d_keypoints_pipeline.py b/modelscope/pipelines/cv/body_2d_keypoints_pipeline.py
index c6a05195..d6afbae4 100644
--- a/modelscope/pipelines/cv/body_2d_keypoints_pipeline.py
+++ b/modelscope/pipelines/cv/body_2d_keypoints_pipeline.py
@@ -1,3 +1,5 @@
+# Copyright (c) Alibaba, Inc. and its affiliates.
+
 import os.path as osp
 from typing import Any, Dict, List, Union