diff --git a/ppocr/modeling/backbones/rec_mv1_enhance.py b/ppocr/modeling/backbones/rec_mv1_enhance.py
index fe874fac1af439bfb47ba9050a61f02db302e224..858f8b915340fe24e8e510f15caf093bc36309c0 100644
--- a/ppocr/modeling/backbones/rec_mv1_enhance.py
+++ b/ppocr/modeling/backbones/rec_mv1_enhance.py
@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# This code is refer from: https://github.com/PaddlePaddle/PaddleClas/blob/develop/ppcls/arch/backbone/legendary_models/pp_lcnet.py
+
 from __future__ import absolute_import
 from __future__ import division
 from __future__ import print_function