diff --git a/docs/config/outbound.md b/docs/config/outbound.md
index 21382d6..48ce04d 100644
--- a/docs/config/outbound.md
+++ b/docs/config/outbound.md
@@ -91,7 +91,7 @@ Mux 相关的具体配置。
 
 ### MuxObject
 
-Mux 功能是在一条 TCP 连接上分发多个 TCP 连接的数据。实现细节详见 [Mux.Cool](../../development/protocols/muxcool)。Mux 是为了减少 TCP 的握手延迟而设计，而非提高连接的吞吐量。使用 Mux 看视频、下载或者测速通常都有反效果。Mux 只需要在客户端启用，服务器端自动适配。
+Mux 功能是在一条 TCP 连接上分发多个 TCP 连接的数据。实现细节详见 [Mux.Cool](../../development/protocols/muxcool)。Mux 是为了减少 TCP 的握手延迟而设计，而非提高连接的吞吐量。使用 Mux 看视频、下载或者测速通常都有反效果。Mux 只需要在客户端启用，服务器端自动适配。Mux 的第二个用途是分发多个 UDP 连接，即 XUDP。
 
 `MuxObject` 对应 `OutboundObject` 中的 `mux` 项。
 
diff --git a/docs/en/config/outbound.md b/docs/en/config/outbound.md
index 7bfdaa7..8f58318 100644
--- a/docs/en/config/outbound.md
+++ b/docs/en/config/outbound.md
@@ -86,7 +86,7 @@ Compatible with v2fly/v2ray-core's configuration [transportLayer](https://www.v2
 
 ### MuxObject
 
-The Mux function distributes the data of multiple TCP connections on a single TCP connection. For implementation details, see [Mux.Cool](../../development/protocols/muxcool). Mux is designed to reduce the latency of TCP handshake, not to increase the throughput of connections. Using Mux for watching videos, downloading, or speed testing usually has negative effects. Mux only needs to be enabled on the client side, and the server side automatically adapts.
+The Mux feature distributes the data of multiple TCP connections on a single TCP connection. For implementation details, see [Mux.Cool](../../development/protocols/muxcool). Mux is designed to reduce the latency of TCP handshake, not to increase the throughput of connections. Using Mux for watching videos, downloading, or speed testing usually has negative effects. Mux only needs to be enabled on the client side, and the server side automatically adapts. Mux has an additional function: to run multiple UDP connections, i.e. XUDP.
 
 `MuxObject` corresponds to the `mux` item in `OutboundObject`.
 
diff --git a/docs/ru/config/outbound.md b/docs/ru/config/outbound.md
index 8814082..022cc4e 100644
--- a/docs/ru/config/outbound.md
+++ b/docs/ru/config/outbound.md
@@ -68,7 +68,7 @@ Xray будет использовать случайный IP-адрес из 
 
 > `mux`: [MuxObject](#muxobject)
 
-Настройки Mux.
+Настройки Mux. Mux позволяет мультиплексировать несколько TCP-соединений через одно TCP-соединение. У Mux есть дополнительная функция: передача UDP-соединений как XUDP.
 
 ### ProxySettingsObject