diff --git a/ppocr/losses/rec_vl_loss.py b/ppocr/losses/rec_vl_loss.py
index 43d1ade6a8..5cd87c709b 100644
--- a/ppocr/losses/rec_vl_loss.py
+++ b/ppocr/losses/rec_vl_loss.py
@@ -11,6 +11,10 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+"""
+This code is refer from: 
+https://github.com/wangyuxin87/VisionLAN
+"""
 
 from __future__ import absolute_import
 from __future__ import division
diff --git a/ppocr/modeling/heads/rec_visionlan_head.py b/ppocr/modeling/heads/rec_visionlan_head.py
index 9a25e64be0..6ec92976fb 100644
--- a/ppocr/modeling/heads/rec_visionlan_head.py
+++ b/ppocr/modeling/heads/rec_visionlan_head.py
@@ -11,6 +11,10 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+"""
+This code is refer from: 
+https://github.com/wangyuxin87/VisionLAN
+"""
 
 from __future__ import absolute_import
 from __future__ import division