diff --git a/egs/wenetspeech4tts/TTS/local/attach_speech_tokens.py b/egs/wenetspeech4tts/TTS/local/attach_speech_tokens.py
new file mode 100644
index 000000000..9904901f0
--- /dev/null
+++ b/egs/wenetspeech4tts/TTS/local/attach_speech_tokens.py
@@ -0,0 +1,108 @@
+#!/usr/bin/env python3
+# Copyright    2025  author: Yuekai Zhang
+#
+# See ../../../../LICENSE for clarification regarding multiple authors
+#
+# 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.
+import argparse
+import gzip
+import json
+import logging
+
+import s3tokenizer
+from lhotse import CutSet, load_manifest_lazy
+from tqdm import tqdm
+
+
+def get_parser():
+    parser = argparse.ArgumentParser(
+        formatter_class=argparse.ArgumentDefaultsHelpFormatter
+    )
+
+    parser.add_argument(
+        "--manifest-dir",
+        type=str,
+        default="data/fbank",
+        help="Directory to store the manifest files",
+    )
+
+    parser.add_argument(
+        "--jsonl-prefix",
+        type=str,
+        default="wenetspeech4tts_cuts_valid",
+        help="The training subset for wenetspeech.",
+    )
+
+    parser.add_argument(
+        "--tokens-path",
+        type=str,
+        default="./s3_tokens_valid/wenetspeech4tts_valid.json",
+        help="json file containing the speech tokens",
+    )
+
+    return parser
+
+
+def get_speech_tokens(tokens_path):
+    id2tokens = {}
+    with open(tokens_path, "r") as fin:
+        for line in fin:
+            line = json.loads(line)
+            id2tokens[line["key"]] = " ".join(map(str, line["code"]))
+    return id2tokens
+
+
+def attach_manifest(manifest, fixed_manifest_path, id2tokens):
+    with CutSet.open_writer(fixed_manifest_path) as manifest_writer:
+        fixed_item = 0
+        for i, cut in enumerate(tqdm(manifest)):
+            cut_id = cut.supervisions[0].id
+            if cut_id in id2tokens:
+                code = id2tokens[cut_id]
+                cut.supervisions[0].custom = {
+                    **cut.supervisions[0].custom,
+                    **{"speech_tokens": code},
+                }
+            else:
+                print(f"cut_id {cut_id} not in id2tokens")
+            fixed_item += 1
+            manifest_writer.write(cut)
+    logging.info(f"Fixed {fixed_item} items in the manifest")
+
+
+def main():
+    formatter = "%(asctime)s %(levelname)s [%(filename)s:%(lineno)d] %(message)s"
+    logging.basicConfig(format=formatter, level=logging.INFO)
+
+    parser = get_parser()
+    args = parser.parse_args()
+    logging.info(vars(args))
+
+    manifest_path = args.manifest_dir + "/" + f"{args.jsonl_prefix}.jsonl.gz"
+    attached_manifest_path = (
+        args.manifest_dir + "/" + f"{args.jsonl_prefix}_attached_cosyvoice_v2.jsonl.gz"
+    )
+    logging.info(f"Loading manifest from {manifest_path}")
+    cuts_manifest = load_manifest_lazy(manifest_path)
+    logging.info(f"Loading manifest from {manifest_path} done")
+    id2tokens = get_speech_tokens(args.tokens_path)
+    logging.info(f"Loaded id2tokens with {len(id2tokens)} entries")
+
+    attach_manifest(cuts_manifest, attached_manifest_path, id2tokens)
+    logging.info(
+        f"Manifest with speech tokens attached is saved to {attached_manifest_path}"
+    )
+
+
+if __name__ == "__main__":
+    main()
diff --git a/egs/wenetspeech4tts/TTS/prepare.sh b/egs/wenetspeech4tts/TTS/prepare.sh
index cf86b3fa5..7b7cd24b7 100755
--- a/egs/wenetspeech4tts/TTS/prepare.sh
+++ b/egs/wenetspeech4tts/TTS/prepare.sh
@@ -111,7 +111,7 @@ if [ $stage -le 5 ] && [ $stop_stage -ge 5 ]; then
 fi
 
 if [ $stage -le 6 ] && [ $stop_stage -ge 6 ]; then
-  log "Stage 7: Split the ${prefix} cuts into train, valid and test sets (used by ./f5-tts)"
+  log "Stage 6: Split the ${prefix} cuts into train, valid and test sets (used by ./f5-tts)"
   if [ ! -f data/fbank/${prefix}_cuts_${subset}.jsonl.gz ]; then
     echo "Combining ${prefix} cuts"
     pieces=$(find data/fbank/ -name "${prefix}_cuts_${subset}.*.jsonl.gz")
@@ -139,3 +139,28 @@ if [ $stage -le 6 ] && [ $stop_stage -ge 6 ]; then
       touch data/fbank/.${prefix}_split.done
   fi
 fi
+
+if [ $stage -le 7 ] && [ $stop_stage -ge 7 ]; then
+  log "Stage 7: Extract cosyvoice2 FSQ token (used by ./f5-tts semantic token experiment)"
+  pip install s3tokenizer
+  split_name=("valid" "test" "train")
+  for split in "${split_name[@]}"; do
+      echo "Processing $split"
+      wav_scp_file=wav_${split}.scp
+      output_dir="./cosy_v2_tokens_${split}"
+      oringinal_jsonl_file=data/fbank/${prefix}_cuts_${split}.jsonl.gz
+      mkdir -p $output_dir
+      zcat $oringinal_jsonl_file | jq -r '.recording.id + " " + .recording.sources[0].source' > $wav_scp_file
+      torchrun --nproc_per_node=8 --nnodes=1 \
+          --rdzv_id=2024 --rdzv_backend="c10d" --rdzv_endpoint="localhost:0" \
+          `which s3tokenizer` --wav_scp $wav_scp_file \
+                      --device "cuda" \
+                      --output_dir $output_dir \
+                      --batch_size 32 \
+                      --num_workers 4 \
+                      --model "speech_tokenizer_v2_25hz"  # or "speech_tokenizer_v1_25hz
+
+      cat $output_dir/* > $output_dir/${prefix}_${split}_cosy_v2_tokens.json
+      python3 local/attach_speech_tokens.py --jsonl-prefix ${prefix}_cuts_${split} --tokens-path $output_dir/${prefix}_${split}_cosy_v2_tokens.json --manifest-dir data/fbank
+  done
+fi