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+# Unitree G1 Description (URDF & MJCF)
+
+## Overview
+
+This package includes a universal humanoid robot description (URDF & MJCF) for the [Unitree G1](https://www.unitree.com/g1/), developed by [Unitree Robotics](https://www.unitree.com/).
+
+MJCF/URDF for the G1 robot:
+
+| MJCF/URDF file name           | `mode_machine` | Hip roll reduction ratio | Update status | dof#leg | dof#waist | dof#arm | dof#hand |
+| ----------------------------- | :------------: | :----------------------: | ------------- | :-----: | :-------: | :-----: | :------: |
+| `g1_23dof`                    |       1        |           14.5           | Beta          |   6*2   |     1     |   5*2   |    0     |
+| `g1_29dof`                    |       2        |           14.5           | Beta          |   6*2   |     3     |   7*2   |    0     |
+| `g1_29dof_with_hand`          |       2        |           14.5           | Beta          |   6*2   |     3     |   7*2   |   7*2    |
+| `g1_29dof_lock_waist`         |       3        |           14.5           | Beta          |   6*2   |     1     |   7*2   |    0     |
+| `g1_23dof_rev_1_0`            |       4        |           22.5           | Up-to-date    |   6*2   |     1     |   5*2   |    0     |
+| `g1_29dof_rev_1_0`            |       5        |           22.5           | Up-to-date    |   6*2   |     3     |   7*2   |    0     |
+| `g1_29dof_with_hand_rev_1_0`  |       5        |           22.5           | Up-to-date    |   6*2   |     3     |   7*2   |   7*2    |
+| `g1_29dof_lock_waist_rev_1_0` |       6        |           22.5           | Up-to-date    |   6*2   |     1     |   7*2   |    0     |
+| `g1_dual_arm`                 |       9        |           null           | Up-to-date    |    0    |     0     |   7*2   |    0     |
+
+## Visulization with [MuJoCo](https://github.com/google-deepmind/mujoco)
+
+1. Open MuJoCo Viewer
+
+   ```bash
+   pip install mujoco
+   python -m mujoco.viewer
+   ```
+
+2. Drag and drop the MJCF/URDF model file (`g1_XXX.xml`/`g1_XXX.urdf`) to the MuJoCo Viewer.
+
+## Note for teleoperate
+g1_body29_hand14 is modified from [g1_29dof_with_hand_rev_1_0](https://github.com/unitreerobotics/unitree_ros/blob/master/robots/g1_description/g1_29dof_with_hand_rev_1_0.urdf)