Update README.md

README.md

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     <a> English </a> | <a href="README_zh-CN.md">中文</a> | <a href="README_ja-JP.md">日本語</a>
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-    <a href="https://github.com/unitreerobotics/xr_teleoperate/wiki">WiKi</a>
+    <a href="https://github.com/unitreerobotics/xr_teleoperate/wiki" target="_blank"> <img src="https://img.shields.io/badge/GitHub-Wiki-181717?logo=github" alt="Unitree LOGO"></a> <a href="https://discord.gg/ZwcVwxv5rq" target="_blank"><img src="https://img.shields.io/badge/-Discord-5865F2?style=flat&logo=Discord&logoColor=white" alt="Unitree LOGO"></a>
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 This repository implements **teleoperation** control of a **Unitree humanoid robot** using **XR (Extended Reality) devices** (such as Apple Vision Pro, PICO 4 Ultra Enterprise, or Meta Quest 3). 
 
+> If you have never worked with a Unitree robot before, please at least read up to the “Application Development” chapter in the [official documentation](https://support.unitree.com/main/en) first.
+Additionally, the [Wiki of this repo](https://github.com/unitreerobotics/xr_teleoperate/wiki) contains a wealth of background knowledge that you can reference at any time.
+
 Here are the required devices and wiring diagram,
 
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