diff --git a/README.md b/README.md
index 5881c74..c41ed2c 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,7 @@ Todo List:
 - [x] [OCS2 Quadruped Control](controllers/ocs2_quadruped_controller)
 - [x] [Learning-based Controller](controllers/rl_quadruped_controller/)
 - [ ] Fully understand the RL Workflow
+- [ ] ROS2 Humble Gazebo Classic Support
 
 Video for Unitree Guide Controller:
 [![](http://i1.hdslb.com/bfs/archive/310e6208920985ac43015b2da31c01ec15e2c5f9.jpg)](https://www.bilibili.com/video/BV1aJbAeZEuo/)
@@ -35,6 +36,10 @@ Video for OCS2 Quadruped Controller:
     ```
 
 ### 1.1 Mujoco Simulator
+Please use this [Mujoco Simulation](hardwares/hardware_unitree_mujoco) for more robot models and contact sensor.
+
+> **Warning:** CycloneDDS ROS2 RMW may conflict with unitree_sdk2. If you cannot launch unitree mujoco simulation without `sudo`, then you cannot used `unitree_mujoco_hardware`. You can switch to gazebo, or tried to solve the conflict by uninstall CycloneDDS ROS2 RMW.
+
 * Launch the unitree mujoco go2 simulation
 * Launch the ros2-control
     ```bash
diff --git a/descriptions/README.md b/descriptions/README.md
index 468a108..c57f0a8 100644
--- a/descriptions/README.md
+++ b/descriptions/README.md
@@ -13,6 +13,8 @@ This folder contains the URDF and SRDF files for the quadruped robot.
 * Deep Robotics
     * [Lite 3](deep_robotics/lite3_description/)
     * [X30](deep_robotics/x30_description/)
+* Anybotics
+    * [Anymal C](anybotics/anymal_c_description/)
 
 ## 1. Steps to transfer urdf to Mujoco model