diff --git a/examples/wenetspeech/asr1/local/extract_meta.py b/examples/wenetspeech/asr1/local/extract_meta.py
index 0e1b2727838052740e5e89593dcdab04ffe387c9..2cad977bee913d6c0db7719ae7d86803e48ac0ff 100644
--- a/examples/wenetspeech/asr1/local/extract_meta.py
+++ b/examples/wenetspeech/asr1/local/extract_meta.py
@@ -1,18 +1,7 @@
-# Copyright (c) 2021 PaddlePaddle Authors. 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.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# 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.
 # Copyright 2021  Xiaomi Corporation (Author: Yongqing Wang)
 #                 Mobvoi Inc(Author: Di Wu, Binbin Zhang)
+# Copyright (c) 2021 PaddlePaddle Authors. 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.
 # You may obtain a copy of the License at
@@ -24,6 +13,7 @@
 # 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.
+
 import argparse
 import json
 import os
diff --git a/paddlespeech/kws/exps/mdtc/compute_det.py b/paddlespeech/kws/exps/mdtc/compute_det.py
index e43a953dbc35246f295a79790b2da55837318114..853056966376cd7551228ebbabdd7bddf334189e 100644
--- a/paddlespeech/kws/exps/mdtc/compute_det.py
+++ b/paddlespeech/kws/exps/mdtc/compute_det.py
@@ -1,3 +1,5 @@
+# Copyright (c) 2021 Binbin Zhang(binbzha@qq.com)
+#               2022 Shaoqing Yu(954793264@qq.com)
 # Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/paddlespeech/kws/exps/mdtc/plot_det_curve.py b/paddlespeech/kws/exps/mdtc/plot_det_curve.py
index a3ea21eff9773f922c789cccaf6b5d5f02fed5c5..4960281eed3b87fe1fd43374382a09526799a663 100644
--- a/paddlespeech/kws/exps/mdtc/plot_det_curve.py
+++ b/paddlespeech/kws/exps/mdtc/plot_det_curve.py
@@ -1,3 +1,5 @@
+# Copyright (c) 2021 Binbin Zhang(binbzha@qq.com)
+#                    Menglong Xu
 # Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/paddlespeech/kws/exps/mdtc/score.py b/paddlespeech/kws/exps/mdtc/score.py
index 1b5e1e2967f62c5f6259ddc40ad8929fd61d1a7c..556455ca19e135b2c9eee4a2523e42c0a2ad1d0e 100644
--- a/paddlespeech/kws/exps/mdtc/score.py
+++ b/paddlespeech/kws/exps/mdtc/score.py
@@ -1,4 +1,6 @@
-# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
+# Copyright (c) 2021 Binbin Zhang(binbzha@qq.com)
+#               2022 Shaoqing Yu(954793264@qq.com)
+#               2022 PaddlePaddle Authors. 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/kws/models/loss.py b/paddlespeech/kws/models/loss.py
index 64c9a32c9f128338081999ebd209719e90fcf98c..bda77f2ba54cc26523a47b33f6ced1be748a2671 100644
--- a/paddlespeech/kws/models/loss.py
+++ b/paddlespeech/kws/models/loss.py
@@ -1,3 +1,4 @@
+# Copyright (c) 2021 Binbin Zhang
 # Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/paddlespeech/kws/models/mdtc.py b/paddlespeech/kws/models/mdtc.py
index 5d2e5de649c5adc43536e15f1867d19e75b589f6..c605a02b6d0167f9a07267ab9d9f3e5b981e0e5f 100644
--- a/paddlespeech/kws/models/mdtc.py
+++ b/paddlespeech/kws/models/mdtc.py
@@ -1,3 +1,4 @@
+# Copyright (c) 2021 Jingyong Hou (houjingyong@gmail.com)
 # Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/paddlespeech/s2t/io/dataset.py b/paddlespeech/s2t/io/dataset.py
index 0e94f047bce7ad053ecd566f4a8d8c83a1b10a7c..9987b511051a302ab76ca52440c0260a6981af5a 100644
--- a/paddlespeech/s2t/io/dataset.py
+++ b/paddlespeech/s2t/io/dataset.py
@@ -1,4 +1,5 @@
 # Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+# Copyright 2021 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/models/u2/u2.py b/paddlespeech/s2t/models/u2/u2.py
index d5471369fef3c9e1af399da0e7e7469a52ddba67..b4b61666f24f0fe67ea85d92565916617d5d20b2 100644
--- a/paddlespeech/s2t/models/u2/u2.py
+++ b/paddlespeech/s2t/models/u2/u2.py
@@ -1,3 +1,4 @@
+# Copyright 2021 Mobvoi Inc. All Rights Reserved.
 # Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/paddlespeech/s2t/models/u2/updater.py b/paddlespeech/s2t/models/u2/updater.py
index c59090a84ee4d416353eff3d6049ff3451cf0dae..898a50bf0a6c241f6b7cdcdbab78310731ead00a 100644
--- a/paddlespeech/s2t/models/u2/updater.py
+++ b/paddlespeech/s2t/models/u2/updater.py
@@ -11,7 +11,7 @@
 # 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.
-# Modified from wenet(https://github.com/wenet-e2e/wenet)
+
 from contextlib import nullcontext
 
 import paddle
diff --git a/paddlespeech/s2t/utils/ctc_utils.py b/paddlespeech/s2t/utils/ctc_utils.py
index 886b72033605e9080ebc7ae06e0a32054325be71..42564d8e137705dbe6a6c1992bc4e6452ebe6ede 100644
--- a/paddlespeech/s2t/utils/ctc_utils.py
+++ b/paddlespeech/s2t/utils/ctc_utils.py
@@ -1,3 +1,4 @@
+# Copyright 2021 Mobvoi Inc. All Rights Reserved.
 # Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/paddlespeech/s2t/utils/text_grid.py b/paddlespeech/s2t/utils/text_grid.py
index cbd9856e40d72897cd08d3618178e60f7a34ea0f..e696f43d5fbb99fd39ff91af388d86a568e76abe 100644
--- a/paddlespeech/s2t/utils/text_grid.py
+++ b/paddlespeech/s2t/utils/text_grid.py
@@ -1,3 +1,4 @@
+# Copyright 2021 Mobvoi Inc. All Rights Reserved.
 # Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/utils/compute-wer.py b/utils/compute-wer.py
index 978a80c9f1d845bc49ffed7a4350a4705bdd50b6..98bb24a7ebd5dff7c7193288caade9e50c03e670 100755
--- a/utils/compute-wer.py
+++ b/utils/compute-wer.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
-# CopyRight WeNet Apache-2.0 License
+# Copyright 2021 Mobvoi Inc. All Rights Reserved.
 import codecs
 import re
 import sys