diff --git a/docs/advanced-usage-zh.md b/docs/advanced-usage-zh.md
index 863ac82..d7079b9 100644
--- a/docs/advanced-usage-zh.md
+++ b/docs/advanced-usage-zh.md
@@ -1,6 +1,6 @@
 # 高级用法
 
-*其他语言版本: [English](advanced-usage.md), [简体中文](advanced-usage-zh.md)。*
+*其他语言版本: [English](advanced-usage.md), [简体中文](advanced-usage-zh.md)。如果你有意见或建议，请[发送反馈](https://bit.ly/vpn-feedback)。*
 
 * [使用其他的 DNS 服务器](#使用其他的-dns-服务器)
 * [域名和更改服务器 IP](#域名和更改服务器-ip)
diff --git a/docs/advanced-usage.md b/docs/advanced-usage.md
index 3002ac8..0075391 100644
--- a/docs/advanced-usage.md
+++ b/docs/advanced-usage.md
@@ -1,6 +1,6 @@
 # Advanced Usage
 
-*Read this in other languages: [English](advanced-usage.md), [简体中文](advanced-usage-zh.md).*
+*Read this in other languages: [English](advanced-usage.md), [简体中文](advanced-usage-zh.md). Have a comment or suggestion? [Send feedback](https://bit.ly/vpn-feedback).*
 
 * [Use alternative DNS servers](#use-alternative-dns-servers)
 * [DNS name and server IP changes](#dns-name-and-server-ip-changes)
diff --git a/docs/clients-xauth-zh.md b/docs/clients-xauth-zh.md
index 37b61e3..037e05c 100644
--- a/docs/clients-xauth-zh.md
+++ b/docs/clients-xauth-zh.md
@@ -1,6 +1,6 @@
 # 配置 IPsec/XAuth VPN 客户端
 
-*其他语言版本: [English](clients-xauth.md), [简体中文](clients-xauth-zh.md)。*
+*其他语言版本: [English](clients-xauth.md), [简体中文](clients-xauth-zh.md)。如果你有意见或建议，请[发送反馈](https://bit.ly/vpn-feedback)。*
 
 **注：** 你也可以使用 [IKEv2](ikev2-howto-zh.md)（推荐）或者 [IPsec/L2TP](clients-zh.md) 模式连接。
 
diff --git a/docs/clients-xauth.md b/docs/clients-xauth.md
index 68e8c10..248c3ad 100644
--- a/docs/clients-xauth.md
+++ b/docs/clients-xauth.md
@@ -1,6 +1,6 @@
 # Configure IPsec/XAuth VPN Clients
 
-*Read this in other languages: [English](clients-xauth.md), [简体中文](clients-xauth-zh.md).*
+*Read this in other languages: [English](clients-xauth.md), [简体中文](clients-xauth-zh.md). Have a comment or suggestion? [Send feedback](https://bit.ly/vpn-feedback).*
 
 **Note:** You may also connect using [IKEv2](ikev2-howto.md) (recommended) or [IPsec/L2TP](clients.md) mode.
 
diff --git a/docs/ikev2-howto-zh.md b/docs/ikev2-howto-zh.md
index e4d4a0f..eb91977 100644
--- a/docs/ikev2-howto-zh.md
+++ b/docs/ikev2-howto-zh.md
@@ -1,6 +1,6 @@
 # IKEv2 VPN 配置和使用指南
 
-*其他语言版本: [English](ikev2-howto.md), [简体中文](ikev2-howto-zh.md)。*
+*其他语言版本: [English](ikev2-howto.md), [简体中文](ikev2-howto-zh.md)。如果你有意见或建议，请[发送反馈](https://bit.ly/vpn-feedback)。*
 
 **注：** 你也可以使用 [IPsec/L2TP](clients-zh.md) 或者 [IPsec/XAuth](clients-xauth-zh.md) 模式连接。
 
diff --git a/docs/ikev2-howto.md b/docs/ikev2-howto.md
index c811a36..40a950f 100644
--- a/docs/ikev2-howto.md
+++ b/docs/ikev2-howto.md
@@ -1,6 +1,6 @@
 # Guide: How to Set Up and Use IKEv2 VPN
 
-*Read this in other languages: [English](ikev2-howto.md), [简体中文](ikev2-howto-zh.md).*
+*Read this in other languages: [English](ikev2-howto.md), [简体中文](ikev2-howto-zh.md). Have a comment or suggestion? [Send feedback](https://bit.ly/vpn-feedback).*
 
 **Note:** You may also connect using [IPsec/L2TP](clients.md) or [IPsec/XAuth](clients-xauth.md) mode.
 
diff --git a/docs/manage-users-zh.md b/docs/manage-users-zh.md
index 3fb5055..efa9a73 100644
--- a/docs/manage-users-zh.md
+++ b/docs/manage-users-zh.md
@@ -1,6 +1,6 @@
 # 管理 VPN 用户
 
-*其他语言版本: [English](manage-users.md), [简体中文](manage-users-zh.md)。*
+*其他语言版本: [English](manage-users.md), [简体中文](manage-users-zh.md)。如果你有意见或建议，请[发送反馈](https://bit.ly/vpn-feedback)。*
 
 在默认情况下，将只创建一个用于 VPN 登录的用户账户。如果你需要查看或管理 IPsec/L2TP 和 IPsec/XAuth ("Cisco IPsec") 模式的用户，请阅读本文档。对于 IKEv2，参见 [管理客户端证书](ikev2-howto-zh.md#管理客户端证书)。
 
diff --git a/docs/manage-users.md b/docs/manage-users.md
index 23ff482..8da74a4 100644
--- a/docs/manage-users.md
+++ b/docs/manage-users.md
@@ -1,6 +1,6 @@
 # Manage VPN Users
 
-*Read this in other languages: [English](manage-users.md), [简体中文](manage-users-zh.md).*
+*Read this in other languages: [English](manage-users.md), [简体中文](manage-users-zh.md). Have a comment or suggestion? [Send feedback](https://bit.ly/vpn-feedback).*
 
 By default, a single user account for VPN login is created. If you wish to view or manage users for the IPsec/L2TP and IPsec/XAuth ("Cisco IPsec") modes, read this document. For IKEv2, see [Manage client certificates](ikev2-howto.md#manage-client-certificates).