IPv6-only guide (Chinese)

README.md

@@ -28,6 +28,7 @@ sudo shutdown -r now
 
 
 [甲骨文云服务器自动获取 IPv6](https://github.com/bohanyang/debi/wiki/%E7%94%B2%E9%AA%A8%E6%96%87%E4%BA%91%E6%9C%8D%E5%8A%A1%E5%99%A8%E8%87%AA%E5%8A%A8%E8%8E%B7%E5%8F%96-IPv6)
+[甲骨文云服务器纯 IPv6 网络（无公网 IPv4）下安装方法](https://github.com/bohanyang/debi/wiki/%E7%94%B2%E9%AA%A8%E6%96%87%E4%BA%91%E6%9C%8D%E5%8A%A1%E5%99%A8%E7%BA%AF-IPv6-%E7%BD%91%E7%BB%9C%EF%BC%88%E6%97%A0%E5%85%AC%E7%BD%91-IPv4%EF%BC%89%E4%B8%8B%E5%AE%89%E8%A3%85%E6%96%B9%E6%B3%95)
 
 ## Introduction