Update docs

README-zh.md

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 IPsec VPN 可以加密你的网络流量，以防止在通过因特网传送时，你和 VPN 服务器之间的任何人对你的数据的未经授权的访问。在使用不安全的网络时，这是特别有用的，例如在咖啡厅，机场或旅馆房间。
 
-**[» :book: Book: 搭建自己的 VPN 服务器分步指南](https://books2read.com/vpnguidezh)** [[中文](https://books2read.com/vpnguidezh) | [English](https://books2read.com/vpnguide?store=amazon) | [Español](https://books2read.com/vpnguidees?store=amazon) | [Deutsch](https://books2read.com/vpnguidede?store=amazon) | [Français](https://books2read.com/vpnguidefr?store=amazon) | [Italiano](https://books2read.com/vpnguideit?store=amazon) | [PT](https://books2read.com/vpnguidept?store=amazon) | [日本語](https://books2read.com/vpnguideja?store=amazon)]
+**[» :book: Book: 搭建自己的 VPN 服务器分步指南](https://books2read.com/vpnguidezh)** [[中文](https://books2read.com/vpnguidezh) | [English](https://books2read.com/vpnguide) | [Español](https://books2read.com/vpnguidees) | [Deutsch](https://books2read.com/vpnguidede) | [Français](https://books2read.com/vpnguidefr) | [Italiano](https://books2read.com/vpnguideit) | [PT](https://books2read.com/vpnguidept?store=amazon) | [日本語](https://books2read.com/vpnguideja?store=amazon)]
 
 ## 快速开始
 

README.md

@@ -10,7 +10,7 @@ Based on Alpine 3.20 or Debian 12 with [Libreswan](https://libreswan.org) (IPsec
 
 An IPsec VPN encrypts your network traffic, so that nobody between you and the VPN server can eavesdrop on your data as it travels via the Internet. This is especially useful when using unsecured networks, e.g. at coffee shops, airports or hotel rooms.
 
-**[» :book: Book: Build Your Own VPN Server](https://books2read.com/vpnguide?store=amazon)** [[English](https://books2read.com/vpnguide?store=amazon) | [中文](https://books2read.com/vpnguidezh) | [Español](https://books2read.com/vpnguidees?store=amazon) | [Deutsch](https://books2read.com/vpnguidede?store=amazon) | [Français](https://books2read.com/vpnguidefr?store=amazon) | [Italiano](https://books2read.com/vpnguideit?store=amazon) | [PT](https://books2read.com/vpnguidept?store=amazon) | [日本語](https://books2read.com/vpnguideja?store=amazon)]
+**[» :book: Book: Build Your Own VPN Server](https://books2read.com/vpnguide)** [[English](https://books2read.com/vpnguide) | [中文](https://books2read.com/vpnguidezh) | [Español](https://books2read.com/vpnguidees) | [Deutsch](https://books2read.com/vpnguidede) | [Français](https://books2read.com/vpnguidefr) | [Italiano](https://books2read.com/vpnguideit) | [PT](https://books2read.com/vpnguidept?store=amazon) | [日本語](https://books2read.com/vpnguideja?store=amazon)]
 
 ## Quick start