diff --git a/egs/libritts/ASR/zipformer/ctc_decode.py b/egs/libritts/ASR/zipformer/ctc_decode.py
index c31b1362a..177f2e392 100755
--- a/egs/libritts/ASR/zipformer/ctc_decode.py
+++ b/egs/libritts/ASR/zipformer/ctc_decode.py
@@ -4,6 +4,7 @@
 #                                                 Liyong Guo,
 #                                                 Quandong Wang,
 #                                                 Zengwei Yao)
+# Copyright 2024 The Chinese Univ. of HK (Author: Zengrui Jin)
 #
 # See ../../../../LICENSE for clarification regarding multiple authors
 #
diff --git a/egs/libritts/ASR/zipformer/decode.py b/egs/libritts/ASR/zipformer/decode.py
index 1249254ef..8b033ce90 100755
--- a/egs/libritts/ASR/zipformer/decode.py
+++ b/egs/libritts/ASR/zipformer/decode.py
@@ -2,6 +2,7 @@
 #
 # Copyright 2021-2023 Xiaomi Corporation (Author: Fangjun Kuang,
 #                                                 Zengwei Yao)
+# Copyright 2024 The Chinese Univ. of HK (Author: Zengrui Jin)
 #
 # See ../../../../LICENSE for clarification regarding multiple authors
 #
diff --git a/egs/libritts/ASR/zipformer/onnx_decode.py b/egs/libritts/ASR/zipformer/onnx_decode.py
index 4b1e2cc5c..99a02c5cf 100755
--- a/egs/libritts/ASR/zipformer/onnx_decode.py
+++ b/egs/libritts/ASR/zipformer/onnx_decode.py
@@ -3,6 +3,7 @@
 # Copyright 2021-2023 Xiaomi Corporation (Author: Fangjun Kuang,
 #                                                 Zengwei Yao,
 #                                                 Xiaoyu Yang)
+# Copyright 2024 The Chinese Univ. of HK (Author: Zengrui Jin)
 #
 # See ../../../../LICENSE for clarification regarding multiple authors
 #
diff --git a/egs/libritts/ASR/zipformer/streaming_decode.py b/egs/libritts/ASR/zipformer/streaming_decode.py
index e771bbafe..4e2f1ecb9 100755
--- a/egs/libritts/ASR/zipformer/streaming_decode.py
+++ b/egs/libritts/ASR/zipformer/streaming_decode.py
@@ -2,6 +2,7 @@
 # Copyright 2022-2023 Xiaomi Corporation (Authors: Wei Kang,
 #                                                  Fangjun Kuang,
 #                                                  Zengwei Yao)
+# Copyright 2024 The Chinese Univ. of HK (Author: Zengrui Jin)
 #
 # See ../../../../LICENSE for clarification regarding multiple authors
 #
@@ -388,11 +389,7 @@ def streaming_forward(
     Returns encoder outputs, output lengths, and updated states.
     """
     cached_embed_left_pad = states[-2]
-    (
-        x,
-        x_lens,
-        new_cached_embed_left_pad,
-    ) = model.encoder_embed.streaming_forward(
+    (x, x_lens, new_cached_embed_left_pad,) = model.encoder_embed.streaming_forward(
         x=features,
         x_lens=feature_lens,
         cached_left_pad=cached_embed_left_pad,
diff --git a/egs/libritts/ASR/zipformer/train.py b/egs/libritts/ASR/zipformer/train.py
index fef2e2ae5..5eb90efbc 100755
--- a/egs/libritts/ASR/zipformer/train.py
+++ b/egs/libritts/ASR/zipformer/train.py
@@ -4,6 +4,7 @@
 #                                                       Mingshuang Luo,
 #                                                       Zengwei Yao,
 #                                                       Daniel Povey)
+# Copyright    2024 The Chinese Univ. of HK   (author: Zengrui Jin)
 #
 # See ../../../../LICENSE for clarification regarding multiple authors
 #