diff --git a/structure/22_bridge/README.md b/structure/22_bridge/README.md
index 4073f65..edc6130 100644
--- a/structure/22_bridge/README.md
+++ b/structure/22_bridge/README.md
@@ -1,8 +1,21 @@
 # 桥接模式
 
-桥接模式分离抽象部分和实现部分。使得两部分独立扩展。
+桥接模式类似于策略模式，原因在于他们都将行为交给了另一个接口实现，再组合实现完整功能/流程/业务.
 
-桥接模式类似于策略模式，原因在于他们都将行为交给了另一个接口实现，再组合实现
-区别在于策略模式封装一系列算法使得算法可以互相替换,关键点在于可以动态替换，但是桥接模式的特点是，一旦组合运行时一般不会发生变化.
+区别在于策略模式封装一系列算法/方法/功能/使得他们可以互相替换,关键点在于策略模式的实现方法可以动态替换，但是桥接模式的特点是，一旦组合运行时一般不会发生变化.
 
+桥接模式的变化点在于调用方是变化的.
 
+在策略模式的例子中，银行就一个，但是储户类型是多个，银行需要为不同类型的用户服务,银行有同一个规则流程和处理方法，但是不同的用户对相同处理过程的响应和处理不一样。
+
+在桥接模式中,消息类型是多个,转给不同的处理对象.
+
+演示1个例子，场景如下：
+
+对于Web应用系统，当平台后端收到消息并需要推送的时候，常见有四种选择：
+1、通过第三方的的Internet通道，离线推送到手机，通知用户
+2、通过邮件通知到用户
+3、通过在线的长连接进行websocket推送
+4、通过手机4G/5G的短信通道通知到用户
+
+选择其中的二三两类进行演示
diff --git a/structure/22_bridge/bridge.go b/structure/22_bridge/bridge.go
index edff839..4aa7db8 100644
--- a/structure/22_bridge/bridge.go
+++ b/structure/22_bridge/bridge.go
@@ -2,58 +2,78 @@ package bridge
 
 import "fmt"
 
-type AbstractMessage interface {
-	SendMessage(text, to string)
+//IMessage 发送消息接口
+type IMessage interface {
+	NoticeUser(text string)
+	Priority() int
 }
 
-type MessageImplementer interface {
-	Send(text, to string)
+//ISMSMessage send SMS MSG
+type ISMSMessage interface {
+	//延迟接口的实现到其他类中
+	NoticeUser(text string, noticeMessage IMessage)
 }
 
-type MessageSMS struct{}
-
-func ViaSMS() MessageImplementer {
-	return &MessageSMS{}
+//WSMessage MSG
+type WSMessage struct {
+	Handler ISMSMessage //持有进一步实现的引用关系
+	Level   int
 }
 
-func (*MessageSMS) Send(text, to string) {
-	fmt.Printf("send %s to %s via SMS", text, to)
-}
-
-type MessageEmail struct{}
-
-func ViaEmail() MessageImplementer {
-	return &MessageEmail{}
-}
-
-func (*MessageEmail) Send(text, to string) {
-	fmt.Printf("send %s to %s via Email", text, to)
-}
-
-type CommonMessage struct {
-	method MessageImplementer
-}
-
-func NewCommonMessage(method MessageImplementer) *CommonMessage {
-	return &CommonMessage{
-		method: method,
+//NoticeUser by SMS
+func (w *WSMessage) NoticeUser(text string) {
+	//转递消息给其他对象，相当于承上启下
+	fmt.Println("Websocket Notice User...", text)
+	//转递消息给其他对象，相当于承上启下，并且需要把上下文变量传递下去
+	if w.Handler != nil {
+		w.Handler.NoticeUser(text, w)
 	}
+
 }
 
-func (m *CommonMessage) SendMessage(text, to string) {
-	m.method.Send(text, to)
+//Priority of SMS
+func (w *WSMessage) Priority() int {
+	return w.Level
 }
 
-type UrgencyMessage struct {
-	method MessageImplementer
+//EmailMessage MSG
+type EmailMessage struct {
+	Handler ISMSMessage
+	Level   int
 }
 
-func NewUrgencyMessage(method MessageImplementer) *UrgencyMessage {
-	return &UrgencyMessage{
-		method: method,
+//NoticeUser by SMS
+func (e *EmailMessage) NoticeUser(text string) {
+	//转递消息给其他对象，相当于承上启下，并且需要把上下文变量传递下去
+	fmt.Println("Email Notice User...", text)
+	if e.Handler != nil {
+		e.Handler.NoticeUser(text, e)
 	}
+
 }
 
-func (m *UrgencyMessage) SendMessage(text, to string) {
-	m.method.Send(fmt.Sprintf("[Urgency] %s", text), to)
+//Priority of SMS
+func (e *EmailMessage) Priority() int {
+	return e.Level
+}
+
+///需要实现具体的消息发送行为
+
+//EmergencyWSMessage 紧急的短信消息
+type EmergencyWSMessage struct {
+}
+
+//NoticeUser by email
+func (e *EmergencyWSMessage) NoticeUser(text string, noticeMessage IMessage) {
+	fmt.Println("Notice User", text, " By Websocket:", "with Level: ", noticeMessage.Priority())
+}
+
+//EmergencyEmailMessage 紧急的短信消息
+type EmergencyEmailMessage struct {
+}
+
+//NoticeUser by email
+func (e *EmergencyEmailMessage) NoticeUser(text string, noticeMessage IMessage) {
+	fmt.Println("Notice User:", text, " By Email:", "with Level: ", noticeMessage.Priority())
+
 }
diff --git a/structure/22_bridge/bridge_test.go b/structure/22_bridge/bridge_test.go
index 23e155d..dd5717b 100644
--- a/structure/22_bridge/bridge_test.go
+++ b/structure/22_bridge/bridge_test.go
@@ -1,29 +1,27 @@
 package bridge
 
-func ExampleCommonSMS() {
-	m := NewCommonMessage(ViaSMS())
-	m.SendMessage("have a drink?", "bob")
-	// Output:
-	// send have a drink? to bob via SMS
-}
+import "testing"
 
-func ExampleCommonEmail() {
-	m := NewCommonMessage(ViaEmail())
-	m.SendMessage("have a drink?", "bob")
-	// Output:
-	// send have a drink? to bob via Email
-}
+func TestSendMessage(t *testing.T) {
 
-func ExampleUrgencySMS() {
-	m := NewUrgencyMessage(ViaSMS())
-	m.SendMessage("have a drink?", "bob")
-	// Output:
-	// send [Urgency] have a drink? to bob via SMS
-}
+	//注意看这里,接口的实例关系在初始化时候是固定的
+	ws := &WSMessage{&EmergencyWSMessage{}, 100}
 
-func ExampleUrgencyEmail() {
-	m := NewUrgencyMessage(ViaEmail())
-	m.SendMessage("have a drink?", "bob")
-	// Output:
-	// send [Urgency] have a drink? to bob via Email
+	//注意看这里,接口的实例关系在初始化时候是固定的
+	email := &EmailMessage{&EmergencyEmailMessage{}, 10}
+
+	ws.NoticeUser("Miss White ,Let's Drink")
+	email.NoticeUser("Miss White,Fire!,Fire!")
+
+	ews := &EmergencyWSMessage{}
+	eem := &EmergencyEmailMessage{}
+	list := []IMessage{
+		&WSMessage{ews, 50},
+		&WSMessage{ews, 100},
+		&EmailMessage{eem, 10},
+		&EmailMessage{eem, 20},
+	}
+	for _, v := range list {
+		v.NoticeUser("Let’s go for fun")
+	}
 }