Update docs

Author: hwdsl2

docs/advanced-usage-zh.md

@@ -264,6 +264,13 @@ sh vpn.sh
 
 **注：** IPv6 支持已在 Android 上使用 strongSwan VPN 客户端进行测试。其他平台（例如 Windows、macOS、iOS）可能存在限制，或者需要进行额外配置才能使 IPv6 通过 IKEv2 VPN 正常工作。
 
+**注：** 对于 **Windows** 客户端，你需要在 PowerShell 窗口中运行以下命令一次，以通过 VPN 路由 IPv6 流量。将 `IKEv2 VPN X.X.X.X` 替换为你的 VPN 连接的实际名称。完成后，重新连接到 IKEv2 VPN。
+
+```powershell
+Add-VpnConnectionRoute -ConnectionName "IKEv2 VPN X.X.X.X" -DestinationPrefix ::/1
+Add-VpnConnectionRoute -ConnectionName "IKEv2 VPN X.X.X.X" -DestinationPrefix 8000::/1
+```
+
 启用 IPv6 后，IKEv2 VPN 客户端将同时获得来自 `192.168.43.0/24` 地址池的 IPv4 地址和来自 `fddd:500:500:500::/64` 地址池的 IPv6 地址。VPN 服务器通过将客户端地址池的 IPv6 流量伪装（NAT）为服务器自身的 IPv6 地址，从而使 VPN 客户端能够通过该隧道获得完整的 IPv6 互联网访问。
 
 **要求：**

docs/advanced-usage.md

@@ -264,6 +264,13 @@ If your VPN server has a public (global unicast) IPv6 address and the requiremen
 
 **Note:** IPv6 support has been tested on Android using the strongSwan VPN client. Other platforms (e.g. Windows, macOS, iOS) may have limitations or require additional configuration for IPv6 to work over the IKEv2 VPN.
 
+**Note:** For **Windows** clients, you need to run the following commands once in a PowerShell window to route IPv6 traffic through the VPN. Replace `IKEv2 VPN X.X.X.X` with the actual name of your VPN connection. When finished, reconnect to the IKEv2 VPN.
+
+```powershell
+Add-VpnConnectionRoute -ConnectionName "IKEv2 VPN X.X.X.X" -DestinationPrefix ::/1
+Add-VpnConnectionRoute -ConnectionName "IKEv2 VPN X.X.X.X" -DestinationPrefix 8000::/1
+```
+
 When IPv6 is enabled, IKEv2 VPN clients receive both an IPv4 address from the `192.168.43.0/24` pool and an IPv6 address from the `fddd:500:500:500::/64` pool. The VPN server masquerades IPv6 traffic from the client pool through the server's own IPv6 address, giving VPN clients full IPv6 internet access through the tunnel.
 
 **Requirements:**