diff --git a/app/main.go b/app/main.go
index eeb2766..4455045 100644
--- a/app/main.go
+++ b/app/main.go
@@ -12,12 +12,17 @@ import (
 type M = map[string]interface{}
 
 func main() {
-	if len(os.Args) == 1 { // 默认情况下，展示saga例子
+	if len(os.Args) == 1 || os.Args[1] == "saga" { // 默认情况下，展示saga例子
 		dtmsvr.PopulateMysql()
 		go dtmsvr.Main()
 		go examples.SagaStartSvr()
 		time.Sleep(100 * time.Millisecond)
 		examples.SagaFireRequest()
+	} else if os.Args[1] == "xa" { // 启动xa示例
+		dtmsvr.PopulateMysql()
+		go dtmsvr.StartSvr()
+		examples.PopulateMysql()
+		examples.XaMain()
 	} else if os.Args[1] == "dtmsvr" { // 只启动dtmsvr
 		go dtmsvr.StartSvr()
 	} else if os.Args[1] == "all" { // 运行所有示例
diff --git a/examples/data.go b/examples/data.go
index 74407bf..aee5629 100644
--- a/examples/data.go
+++ b/examples/data.go
@@ -21,7 +21,7 @@ func RunSqlScript(mysql map[string]string, script string) {
 	sqls := strings.Split(string(content), ";")
 	for _, sql := range sqls {
 		s := strings.TrimSpace(sql)
-		if strings.Contains(strings.ToLower(s), "drop1") || s == "" {
+		if s == "" {
 			continue
 		}
 		logrus.Printf("executing: '%s'", s)
diff --git a/examples/main_xa.go b/examples/main_xa.go
index 80af58b..d772f03 100644
--- a/examples/main_xa.go
+++ b/examples/main_xa.go
@@ -81,7 +81,7 @@ func xaTransIn(c *gin.Context) (interface{}, error) {
 			return fmt.Errorf("tranIn failed")
 		}
 		dbr := db.Model(&UserAccount{}).Where("user_id = ?", c.Query("user_id")).
-			Update("balance", gorm.Expr("balance - ?", req.Amount))
+			Update("balance", gorm.Expr("balance + ?", req.Amount))
 		return dbr.Error
 	})
 	e2p(err)
@@ -95,7 +95,7 @@ func xaTransOut(c *gin.Context) (interface{}, error) {
 			return fmt.Errorf("tranOut failed")
 		}
 		dbr := db.Model(&UserAccount{}).Where("user_id = ?", c.Query("user_id")).
-			Update("balance", gorm.Expr("balance + ?", req.Amount))
+			Update("balance", gorm.Expr("balance - ?", req.Amount))
 		return dbr.Error
 	})
 	e2p(err)