diff --git a/ppocr/losses/rec_vl_loss.py b/ppocr/losses/rec_vl_loss.py
index 43d1ade6a823a07e14233343a6ea0e77db9a3e97..5cd87c709bbf81d2fd83d721d49086256f2ab629 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 9a25e64be0c5e7beedd300144ce26311ce2d6713..6ec92976fbf3e9cad2da3fa80ee8d6a614b1f8b5 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