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 [中文文档](README_CN.md)
 
+**Version Select: [ROS-Noetic](https://github.com/fan-ziqi/rl_sar/tree/main) | [ROS2-Foxy](https://github.com/fan-ziqi/rl_sar/tree/ros2)**
+
 This repository provides a framework for simulation verification and physical deployment of robot reinforcement learning algorithms, suitable for quadruped robots, wheeled robots, and humanoid robots. "sar" stands for "simulation and real"
 
 feature:
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 [English document](README.md)
 
+**版本选择: [ROS-Noetic](https://github.com/fan-ziqi/rl_sar/tree/main) | [ROS2-Foxy](https://github.com/fan-ziqi/rl_sar/tree/ros2)**
+
 本仓库提供了机器人强化学习算法的仿真验证与实物部署框架，适配四足机器人、轮足机器人、人形机器人。"sar"代表"simulation and real"
 
 特性：