diff --git a/paddlespeech/s2t/modules/attention.py b/paddlespeech/s2t/modules/attention.py
index 80eaf9754..3d5f8cd1d 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 6e97f8245..67f71b667 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 7601a5cca..7ec92554e 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 b0ab869a2..6b4d95912 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 4d5160682..520b18dea 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 9207658f9..5d4e91753 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 0cde5b9f2..5c8ba0810 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 29d5a2d87..d39c0695a 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 5750f5a0f..c7d9bd45d 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 6576cb922..d6b63761b 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 347264e9d..e2619cd49 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 759bd540f..99a8300f2 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.