diff --git a/paddlespeech/s2t/modules/attention.py b/paddlespeech/s2t/modules/attention.py
index 80eaf97542b090adec271570ce991e693b61e124..3d5f8cd1d3aaff3841a8b519bb7b3af178c700ef 100644
--- a/paddlespeech/s2t/modules/attention.py
+++ b/paddlespeech/s2t/modules/attention.py
@@ -1,4 +1,5 @@
 # Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+# Copyright 2019 Mobvoi Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/paddlespeech/s2t/modules/cmvn.py b/paddlespeech/s2t/modules/cmvn.py
index 6e97f82458921bf287778b0e95a869ca54950138..67f71b6678e9908613b0fe867a44453fb204297a 100644
--- a/paddlespeech/s2t/modules/cmvn.py
+++ b/paddlespeech/s2t/modules/cmvn.py
@@ -1,4 +1,5 @@
 # Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+# Copyright 2019 Mobvoi Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/paddlespeech/s2t/modules/conformer_convolution.py b/paddlespeech/s2t/modules/conformer_convolution.py
index 7601a5cca607df2820ba45583190516b2c80a48c..7ec92554eec73b8889335b3a16fd1a34692bb021 100644
--- a/paddlespeech/s2t/modules/conformer_convolution.py
+++ b/paddlespeech/s2t/modules/conformer_convolution.py
@@ -1,4 +1,5 @@
 # Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+# Copyright 2019 Mobvoi Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/paddlespeech/s2t/modules/decoder.py b/paddlespeech/s2t/modules/decoder.py
index b0ab869a212b2fb3f9b9216e9f41f4b8b07b0fe0..6b4d959123b19cc23cd42bdcf68491ac6e5f61de 100644
--- a/paddlespeech/s2t/modules/decoder.py
+++ b/paddlespeech/s2t/modules/decoder.py
@@ -1,4 +1,5 @@
 # Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+# Copyright 2019 Mobvoi Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/paddlespeech/s2t/modules/decoder_layer.py b/paddlespeech/s2t/modules/decoder_layer.py
index 4d516068239beac686c116846d75a3dbebcd8194..520b18dea17928b6fe95bbda804bd89ef28aa904 100644
--- a/paddlespeech/s2t/modules/decoder_layer.py
+++ b/paddlespeech/s2t/modules/decoder_layer.py
@@ -1,4 +1,5 @@
 # Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+# Copyright 2019 Mobvoi Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/paddlespeech/s2t/modules/embedding.py b/paddlespeech/s2t/modules/embedding.py
index 9207658f99bec9d9bcec8425d7f8a74f2bc146f5..5d4e91753b38129a9c2c71d706787af9d14a903d 100644
--- a/paddlespeech/s2t/modules/embedding.py
+++ b/paddlespeech/s2t/modules/embedding.py
@@ -1,4 +1,5 @@
 # Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+# Copyright 2019 Mobvoi Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/paddlespeech/s2t/modules/encoder.py b/paddlespeech/s2t/modules/encoder.py
index 0cde5b9f2360f005565d17c68cd7384b74039a2c..5c8ba0810d00db66a3c96238cf5d243802eb9d7b 100644
--- a/paddlespeech/s2t/modules/encoder.py
+++ b/paddlespeech/s2t/modules/encoder.py
@@ -1,4 +1,5 @@
 # Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+# Copyright 2019 Mobvoi Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/paddlespeech/s2t/modules/encoder_layer.py b/paddlespeech/s2t/modules/encoder_layer.py
index 29d5a2d872e61a7f8aec7ace9bde05829043b08c..d39c0695a044cd9cdc5969b547be911565015672 100644
--- a/paddlespeech/s2t/modules/encoder_layer.py
+++ b/paddlespeech/s2t/modules/encoder_layer.py
@@ -1,4 +1,5 @@
 # Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+# Copyright 2019 Mobvoi Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/paddlespeech/s2t/modules/loss.py b/paddlespeech/s2t/modules/loss.py
index 5750f5a0f79e8b2bce0f89b7f68c4c696d9e85f8..c7d9bd45dd2bf005a575098456c435a173678d26 100644
--- a/paddlespeech/s2t/modules/loss.py
+++ b/paddlespeech/s2t/modules/loss.py
@@ -1,4 +1,5 @@
 # Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+# Copyright 2019 Mobvoi Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/paddlespeech/s2t/modules/mask.py b/paddlespeech/s2t/modules/mask.py
index 6576cb9221e027feeaee4651b2f73795fa174225..d6b63761b49b530db68a7ff0bb342675124c9fca 100644
--- a/paddlespeech/s2t/modules/mask.py
+++ b/paddlespeech/s2t/modules/mask.py
@@ -1,4 +1,5 @@
 # Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+# Copyright 2019 Mobvoi Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/paddlespeech/s2t/modules/positionwise_feed_forward.py b/paddlespeech/s2t/modules/positionwise_feed_forward.py
index 347264e9d6cd9211f2c54ca556e99ba36cd1ae71..e2619cd49dc15ef7d9ddb1fbbb991f3fe3eb1c35 100644
--- a/paddlespeech/s2t/modules/positionwise_feed_forward.py
+++ b/paddlespeech/s2t/modules/positionwise_feed_forward.py
@@ -1,4 +1,5 @@
 # Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+# Copyright 2019 Mobvoi Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/paddlespeech/s2t/modules/subsampling.py b/paddlespeech/s2t/modules/subsampling.py
index 759bd540f5b0149a03ef70ab6353bdcd6817d16d..99a8300f246149e924fe741f53934259d404e4e8 100644
--- a/paddlespeech/s2t/modules/subsampling.py
+++ b/paddlespeech/s2t/modules/subsampling.py
@@ -1,4 +1,5 @@
 # Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+# Copyright 2019 Mobvoi Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.