diff --git a/docs/source/recipes/timit/tdnn_ligru_ctc.rst b/docs/source/recipes/timit/tdnn_ligru_ctc.rst
index 771df81c1..45724bc0e 100644
--- a/docs/source/recipes/timit/tdnn_ligru_ctc.rst
+++ b/docs/source/recipes/timit/tdnn_ligru_ctc.rst
@@ -390,3 +390,17 @@ The decoding output is:
 
 
   2021-11-08 20:37:56,348 INFO [pretrained.py:269] Decoding Done
+
+
+Colab notebook
+--------------
+
+We provide a colab notebook for decoding with pre-trained model.
+
+|timit tdnn_ligru_ctc colab notebook|
+
+.. |timit tdnn_ligru_ctc colab notebook| image:: https://colab.research.google.com/assets/colab-badge.svg
+   :target: https://colab.research.google.com/drive/11IT-k4HQIgQngXz1uvWsEYktjqQt7Tmb
+
+
+**Congratulations!** You have finished the TDNN-LiGRU-CTC recipe on timit in ``icefall``.
diff --git a/docs/source/recipes/timit/tdnn_lstm_ctc.rst b/docs/source/recipes/timit/tdnn_lstm_ctc.rst
index 0d15cb460..6f760a9ce 100644
--- a/docs/source/recipes/timit/tdnn_lstm_ctc.rst
+++ b/docs/source/recipes/timit/tdnn_lstm_ctc.rst
@@ -387,4 +387,18 @@ The decoding output is:
   sil hh ah z sil b ih n iy w ah z sil b ae n ih sil b ay s sil n ey sil k ih l f eh n s ih z eh n dh eh r w er sil g r ey z ih n sil k ae dx l sil
 
 
-2021-11-08 20:05:27,878 INFO [pretrained.py:269] Decoding Done
\ No newline at end of file
+2021-11-08 20:05:27,878 INFO [pretrained.py:269] Decoding Done
+
+
+Colab notebook
+--------------
+
+We provide a colab notebook for decoding with pre-trained model.
+
+|timit tdnn_lstm_ctc colab notebook|
+
+.. |timit tdnn_lstm_ctc colab notebook| image:: https://colab.research.google.com/assets/colab-badge.svg
+   :target: https://colab.research.google.com/drive/1Hs9DA4V96uapw_30uNp32OMJgkuR5VVd
+
+
+**Congratulations!** You have finished the TDNN-LSTM-CTC recipe on timit in ``icefall``.