diff --git a/egs/aishell/ASR/local/make_syllable_lexicon.py b/egs/aishell/ASR/local/make_syllable_lexicon.py
deleted file mode 100755
index 33e1f8b2b..000000000
--- a/egs/aishell/ASR/local/make_syllable_lexicon.py
+++ /dev/null
@@ -1,68 +0,0 @@
-#!/usr/bin/env python3
-
-# Copyright 2021 (Author: Pingfeng Luo)
-"""
-    make syllables lexicon and handle heteronym
-"""
-import argparse
-from pathlib import Path
-from pypinyin import pinyin, lazy_pinyin, Style
-
-def get_args():
-    parser = argparse.ArgumentParser()
-    parser.add_argument("--lexicon", type=str, help="The input lexicon file.")
-    return parser.parse_args()
-
-
-def process_line(
-    line: str
-) -> None:
-    """
-    Args:
-      line:
-        A line of transcript consisting of space(s) separated word and phones
-        input :
-        你好 n i3 h ao3
-        晴天 q ing2 t ian1
-
-        output :
-        你好 ni3 hao3
-        晴天 qing2 tian1
-    Returns:
-      Return None.
-    """
-    chars = line.strip().split()[0]
-    pinyins = pinyin(chars, style=Style.TONE3, heteronym=True)
-    word_syllables = []
-    word_syllables_num = 1
-    inited = False
-    for char_syllables in pinyins:
-        new_char_syllables_num = len(char_syllables)
-        if not inited and len(char_syllables):
-            word_syllables = [char_syllables[0]]
-            inited = True
-        elif new_char_syllables_num == 1:
-            for i in range(word_syllables_num):
-                word_syllables[i] += " " + str(char_syllables)
-        elif new_char_syllables_num > 1:
-            word_syllables = word_syllables * new_char_syllables_num
-            for pre_index in range(word_syllables_num):
-                for expand_index in range(new_char_syllables_num):
-                    word_syllables[pre_index * new_char_syllables_num + expand_index] += " " + char_syllables[expand_index]
-            word_syllables_num *= new_char_syllables_num
-
-    for word_syallable in word_syllables:
-        print("{} {}".format(chars.strip(),  str(word_syallable).strip()))
-
-
-def main():
-    args = get_args()
-    assert Path(args.lexicon).is_file()
-
-    with open(args.lexicon) as f:
-        for line in f:
-            process_line(line=line)
-
-
-if __name__ == "__main__":
-    main()
diff --git a/egs/aishell/ASR/local/prepare_lang.py b/egs/aishell/ASR/local/prepare_lang.py
index 495f62cb4..8c208e10d 100755
--- a/egs/aishell/ASR/local/prepare_lang.py
+++ b/egs/aishell/ASR/local/prepare_lang.py
@@ -317,7 +317,8 @@ def lexicon_to_fst(
 
 def get_args():
     parser = argparse.ArgumentParser()
-    parser.add_argument("--lang-dir", type=str, help="The lang dir, data/lang_phone or data/lang_syllable")
+    parser.add_argument("--lang-dir", type=str,
+                        help="The lang dir, data/lang_phone")
     return parser.parse_args()
 
 
diff --git a/egs/aishell/ASR/tdnn_lstm_ctc/asr_datamodule.py b/egs/aishell/ASR/tdnn_lstm_ctc/asr_datamodule.py
index b3f88a597..3a10f39b6 100644
--- a/egs/aishell/ASR/tdnn_lstm_ctc/asr_datamodule.py
+++ b/egs/aishell/ASR/tdnn_lstm_ctc/asr_datamodule.py
@@ -340,17 +340,17 @@ class AishellAsrDataModule:
     def train_cuts(self) -> CutSet:
         logging.info("About to get train cuts")
         cuts_train = load_manifest(self.args.manifest_dir /
-                "cuts_train.json.gz")
+                                   "cuts_train.json.gz")
         return cuts_train
 
     @lru_cache()
     def valid_cuts(self) -> CutSet:
         logging.info("About to get dev cuts")
-        return load_manifest(self.args.manifest_dir / 
-                "cuts_dev.json.gz")
+        return load_manifest(self.args.manifest_dir /
+                             "cuts_dev.json.gz")
 
     @lru_cache()
     def test_cuts(self) -> List[CutSet]:
         logging.info("About to get test cuts")
-        return load_manifest(self.args.manifest_dir / 
-                "cuts_test.json.gz")
+        return load_manifest(self.args.manifest_dir /
+                             "cuts_test.json.gz")