diff --git a/README.md b/README.md
index 061fb4b..d682593 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@ This is the GUI support for the [RLCard](https://github.com/datamllab/rlcard) pr
 *   Tutorial in Jupyter Notebook: [https://github.com/datamllab/rlcard-tutorial](https://github.com/datamllab/rlcard-tutorial)
 *   Paper: [https://www.ijcai.org/Proceedings/2020/764](https://www.ijcai.org/Proceedings/2020/764)
 *   Document: [Click Here](docs/README.md)
+*   Online Demo with DouZero: [https://www.douzero.org/](https://www.douzero.org/)
 
 ## Cite this work
 Daochen Zha, Kwei-Herng Lai, Songyi Huang, Yuanpu Cao, Keerthana Reddy, Juan Vargas, Alex Nguyen, Ruzhe Wei, Junyu Guo, and Xia Hu. "RLCard: A Platform for Reinforcement Learning in Card Games." In IJCAI. 2020.