diff --git a/taoyao-signal-server/taoyao-boot/src/main/java/com/acgist/taoyao/boot/annotation/Description.java b/taoyao-signal-server/taoyao-boot/src/main/java/com/acgist/taoyao/boot/annotation/Description.java
index 6c51409..4a8d3cf 100644
--- a/taoyao-signal-server/taoyao-boot/src/main/java/com/acgist/taoyao/boot/annotation/Description.java
+++ b/taoyao-signal-server/taoyao-boot/src/main/java/com/acgist/taoyao/boot/annotation/Description.java
@@ -10,8 +10,8 @@ import java.lang.annotation.Target;
 /**
  * 信令描述
  * 
- * -[消息类型]> 异步请求 | 单播
- * =[消息类型]> 同步请求
+ * -[消息类型]> 异步请求 | 单播消息
+ * =[消息类型]> 同步请求：到达目标终端后沿原路返回
  * -[消息类型]) 全员广播：对所有的终端广播信令（排除自己）
  * +[消息类型]) 全员广播：对所有的终端广播信令（包含自己）
  * 
diff --git a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/controller/ProtocolController.java b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/controller/ProtocolController.java
index a782950..590fd8b 100644
--- a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/controller/ProtocolController.java
+++ b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/controller/ProtocolController.java
@@ -57,8 +57,8 @@ public class ProtocolController {
             ### 符号解释
             
             ```
-            -[消息类型]> 异步请求 | 单播
-            =[消息类型]> 同步请求
+            -[消息类型]> 异步请求 | 单播消息
+            =[消息类型]> 同步请求：到达目标终端后沿原路返回
             -[消息类型]) 全员广播：对所有的终端广播信令（排除自己）
             +[消息类型]) 全员广播：对所有的终端广播信令（包含自己）
             ...：其他自定义的透传内容
diff --git a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/client/ClientCloseProtocol.java b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/client/ClientCloseProtocol.java
index b56c434..79be788 100644
--- a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/client/ClientCloseProtocol.java
+++ b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/client/ClientCloseProtocol.java
@@ -29,8 +29,8 @@ import lombok.extern.slf4j.Slf4j;
         如果终端意外掉线，需要自己实现重连逻辑。
         """,
     flow = {
-        "终端=>信令服务->终端",
-        "终端=>信令服务-[终端下线])终端",
+        "终端=>信令服务",
+        "终端=[关闭终端]>信令服务-[终端下线])终端",
         "终端-[连接断开]>信令服务-[终端下线])终端"
     }
 )
diff --git a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/client/ClientListProtocol.java b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/client/ClientListProtocol.java
index b2b4720..42b8cda 100644
--- a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/client/ClientListProtocol.java
+++ b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/client/ClientListProtocol.java
@@ -52,7 +52,7 @@ import com.acgist.taoyao.signal.protocol.ProtocolClientAdapter;
         ]
         """
     },
-    flow = "终端=>信令服务->终端"
+    flow = "终端=>信令服务"
 )
 public class ClientListProtocol extends ProtocolClientAdapter {
 
diff --git a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/client/ClientRegisterProtocol.java b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/client/ClientRegisterProtocol.java
index fe58822..5d9b927 100644
--- a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/client/ClientRegisterProtocol.java
+++ b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/client/ClientRegisterProtocol.java
@@ -53,7 +53,7 @@ import lombok.extern.slf4j.Slf4j;
     }
     """,
     flow = {
-        "终端=>信令服务->终端",
+        "终端=>信令服务",
         "终端=>信令服务-[终端配置]>终端",
         "终端=>信令服务-[终端上线])终端"
     }
diff --git a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/client/ClientStatusProtocol.java b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/client/ClientStatusProtocol.java
index 5f43fd4..16d9112 100644
--- a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/client/ClientStatusProtocol.java
+++ b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/client/ClientStatusProtocol.java
@@ -47,7 +47,7 @@ import com.acgist.taoyao.signal.protocol.ProtocolClientAdapter;
         }
         """
     },
-    flow = "终端=>信令服务->终端"
+    flow = "终端=>信令服务"
 )
 public class ClientStatusProtocol extends ProtocolClientAdapter {
 
diff --git a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/control/ControlClientRecordProtocol.java b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/control/ControlClientRecordProtocol.java
index da45558..d0c46d8 100644
--- a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/control/ControlClientRecordProtocol.java
+++ b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/control/ControlClientRecordProtocol.java
@@ -33,8 +33,8 @@ import com.acgist.taoyao.signal.protocol.ProtocolControlAdapter;
         """
     },
     flow = {
-        "信令服务->目标终端->信令服务",
-        "终端=>信令服务->目标终端->信令服务->终端"
+        "信令服务=>终端",
+        "终端=>信令服务->终端"
     }
 )
 public class ControlClientRecordProtocol extends ProtocolControlAdapter implements IControlClientRecordProtocol {
diff --git a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/control/ControlConfigAudioProtocol.java b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/control/ControlConfigAudioProtocol.java
index 2fc4d60..5545b1b 100644
--- a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/control/ControlConfigAudioProtocol.java
+++ b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/control/ControlConfigAudioProtocol.java
@@ -25,7 +25,7 @@ import com.acgist.taoyao.signal.protocol.ProtocolControlAdapter;
     }
     """,
     flow = {
-        "信令服务->终端",
+        "信令服务=>终端",
         "终端=>信令服务->终端"
     }
 )
diff --git a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/control/ControlConfigVideoProtocol.java b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/control/ControlConfigVideoProtocol.java
index 5c14ea7..c8264f6 100644
--- a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/control/ControlConfigVideoProtocol.java
+++ b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/control/ControlConfigVideoProtocol.java
@@ -25,7 +25,7 @@ import com.acgist.taoyao.signal.protocol.ProtocolControlAdapter;
     }
     """,
     flow = {
-        "信令服务->终端",
+        "信令服务=>终端",
         "终端=>信令服务->终端"
     }
 )
diff --git a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/control/ControlPhotographProtocol.java b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/control/ControlPhotographProtocol.java
index e385abd..a5c5def 100644
--- a/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/control/ControlPhotographProtocol.java
+++ b/taoyao-signal-server/taoyao-signal/src/main/java/com/acgist/taoyao/signal/protocol/control/ControlPhotographProtocol.java
@@ -29,8 +29,8 @@ import com.acgist.taoyao.signal.protocol.ProtocolControlAdapter;
         """
     },
     flow = {
-        "信令服务->目标终端->信令服务",
-        "终端=>信令服务->目标终端->信令服务->终端"
+        "信令服务=>终端",
+        "终端=>信令服务->终端"
     }
 )
 public class ControlPhotographProtocol extends ProtocolControlAdapter implements IControlPhotographProtocol {