diff --git a/README-en.md b/README-en.md
index d4085d1..efcfd8b 100644
--- a/README-en.md
+++ b/README-en.md
@@ -46,16 +46,17 @@ Configure mysql:
 ``` go
   // business microservice address
   const qsBusi = "http://localhost:8081/api/busi_saga"
-	req := &gin.H{"amount": 30} // Microservice payload
-	// The address where DtmServer serves DTM, which is a url
-	saga := dtmcli.NewSaga("http://localhost:8080/api/dtmsvr").
+  req := &gin.H{"amount": 30} // Microservice payload
+  // The address where DtmServer serves DTM, which is a url
+  DtmServer := "http://localhost:8080/api/dtmsvr"
+  saga := dtmcli.NewSaga(DtmServer, dtmcli.MustGenGid(DtmServer)).
     // Add a TransOut sub-transaction, the operation is url: qsBusi+"/TransOut"，
     // compensation operation is url: qsBusi+"/TransOutCompensate"
-		Add(qsBusi+"/TransOut", qsBusi+"/TransOutCompensate", req).
+    Add(qsBusi+"/TransOut", qsBusi+"/TransOutCompensate", req).
     // Add a TransIn sub-transaction, the operation is url: qsBusi+"/TransOut"，
     // compensation operation is url: qsBusi+"/TransInCompensate"
-		Add(qsBusi+"/TransIn", qsBusi+"/TransInCompensate", req)
-	// Submit the saga transaction, dtm will complete all sub-transactions/rollback all sub-transactions
+    Add(qsBusi+"/TransIn", qsBusi+"/TransInCompensate", req)
+  // Submit the saga transaction, dtm will complete all sub-transactions/rollback all sub-transactions
   err := saga.Submit()
 ```
 ### Complete example
diff --git a/README.md b/README.md
index f4bf513..2f2fa1f 100644
--- a/README.md
+++ b/README.md
@@ -55,14 +55,15 @@ DTM是首款golang的开源分布式事务管理器，优雅的解决了幂等
 ``` GO
   // 具体业务微服务地址
   const qsBusi = "http://localhost:8081/api/busi_saga"
-	req := &gin.H{"amount": 30} // 微服务的载荷
-	// DtmServer为DTM服务的地址，是一个url
-	saga := dtmcli.NewSaga("http://localhost:8080/api/dtmsvr").
-		// 添加一个TransOut的子事务，正向操作为url: qsBusi+"/TransOut"， 补偿操作为url: qsBusi+"/TransOutCompensate"
-		Add(qsBusi+"/TransOut", qsBusi+"/TransOutCompensate", req).
-		// 添加一个TransIn的子事务，正向操作为url: qsBusi+"/TransOut"， 补偿操作为url: qsBusi+"/TransInCompensate"
-		Add(qsBusi+"/TransIn", qsBusi+"/TransInCompensate", req)
-	// 提交saga事务，dtm会完成所有的子事务/回滚所有的子事务
+  req := &gin.H{"amount": 30} // 微服务的载荷
+  // DtmServer为DTM服务的地址，是一个url
+  DtmServer := "http://localhost:8080/api/dtmsvr"
+  saga := dtmcli.NewSaga(DtmServer, dtmcli.MustGenGid(DtmServer)).
+    // 添加一个TransOut的子事务，正向操作为url: qsBusi+"/TransOut"， 补偿操作为url: qsBusi+"/TransOutCompensate"
+    Add(qsBusi+"/TransOut", qsBusi+"/TransOutCompensate", req).
+    // 添加一个TransIn的子事务，正向操作为url: qsBusi+"/TransOut"， 补偿操作为url: qsBusi+"/TransInCompensate"
+    Add(qsBusi+"/TransIn", qsBusi+"/TransInCompensate", req)
+  // 提交saga事务，dtm会完成所有的子事务/回滚所有的子事务
   err := saga.Submit()
 ```
 
diff --git a/go.mod b/go.mod
index a8e3f1d..90e21d0 100644
--- a/go.mod
+++ b/go.mod
@@ -7,7 +7,7 @@ require (
 	github.com/gin-gonic/gin v1.6.3
 	github.com/go-playground/assert/v2 v2.0.1
 	github.com/go-resty/resty/v2 v2.6.0
-	github.com/json-iterator/go v1.1.10
+	github.com/json-iterator/go v1.1.10 // indirect
 	github.com/kr/pretty v0.1.0 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.1 // indirect
diff --git a/go.sum b/go.sum
index c75d67a..6ee955e 100644
--- a/go.sum
+++ b/go.sum
@@ -91,8 +91,5 @@ gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C
 gorm.io/driver/mysql v1.0.3 h1:+JKBYPfn1tygR1/of/Fh2T8iwuVwzt+PEJmKaXzMQXg=
 gorm.io/driver/mysql v1.0.3/go.mod h1:twGxftLBlFgNVNakL7F+P/x9oYqoymG3YYT8cAfI9oI=
 gorm.io/gorm v1.20.4/go.mod h1:0HFTzE/SqkGTzK6TlDPPQbAYCluiVvhzoA1+aVyzenw=
-gorm.io/gorm v1.20.12 h1:ebZ5KrSHzet+sqOCVdH9mTjW91L298nX3v5lVxAzSUY=
-gorm.io/gorm v1.20.12/go.mod h1:0HFTzE/SqkGTzK6TlDPPQbAYCluiVvhzoA1+aVyzenw=
 gorm.io/gorm v1.21.12 h1:3fQM0Eiz7jcJEhPggHEpoYnsGZqynMzverL77DV40RM=
 gorm.io/gorm v1.21.12/go.mod h1:F+OptMscr0P2F2qU97WT1WimdH9GaQPoDW7AYd5i2Y0=
-