diff --git a/modular/example/internal/service/expose/attack.go b/modular/example/internal/service/expose/attack.go
index d7b2766b..77b4fbcb 100644
--- a/modular/example/internal/service/expose/attack.go
+++ b/modular/example/internal/service/expose/attack.go
@@ -1,5 +1,7 @@
 package expose
 
+var AttackExpose Attack
+
 type Attack interface {
 	Name() string
 }
diff --git a/modular/example/internal/service/expose/login.go b/modular/example/internal/service/expose/login.go
index 6beef399..22659c4c 100644
--- a/modular/example/internal/service/expose/login.go
+++ b/modular/example/internal/service/expose/login.go
@@ -1,5 +1,7 @@
 package expose
 
+var LoginExpose Login
+
 type Login interface {
 	Name() string
 }
diff --git a/modular/example/internal/service/services/attack/attack.go b/modular/example/internal/service/services/attack/attack.go
index 4b115246..bb7bbe7d 100644
--- a/modular/example/internal/service/services/attack/attack.go
+++ b/modular/example/internal/service/services/attack/attack.go
@@ -11,15 +11,16 @@ type Service struct {
 }
 
 func (a *Service) OnInit() {
+	expose.AttackExpose = a
 	a.name = "attack"
 }
 
 func (a *Service) OnPreload() {
-	fmt.Println(a.name, "call", a.Login.Name())
+	a.Login = expose.LoginExpose
 }
 
 func (a *Service) OnMount() {
-
+	fmt.Println("attack service mounted, call", a.Login.Name(), "service")
 }
 
 func (a *Service) Name() string {
diff --git a/modular/example/internal/service/services/login/login.go b/modular/example/internal/service/services/login/login.go
index 99b3de3b..002f48f9 100644
--- a/modular/example/internal/service/services/login/login.go
+++ b/modular/example/internal/service/services/login/login.go
@@ -11,15 +11,16 @@ type Service struct {
 }
 
 func (l *Service) OnInit() {
+	expose.LoginExpose = l
 	l.name = "login"
 }
 
 func (l *Service) OnPreload() {
-	fmt.Println(l.name, "call", l.Attack.Name())
+	l.Attack = expose.AttackExpose
 }
 
 func (l *Service) OnMount() {
-
+	fmt.Println("attack service mounted, call", l.Attack.Name(), "service")
 }
 
 func (l *Service) Name() string {
diff --git a/modular/modular.go b/modular/modular.go
index 58fc55df..e695f144 100644
--- a/modular/modular.go
+++ b/modular/modular.go
@@ -47,15 +47,6 @@ func Run() {
 	// OnPreload
 	for i := 0; i < len(m.services); i++ {
 		s := m.services[i]
-		for f := 0; f < s.vof.Elem().NumField(); f++ {
-			field := s.vof.Elem().Field(f)
-			for _, v := range tvm {
-				if v.Type().AssignableTo(field.Type()) {
-					field.Set(v)
-					break
-				}
-			}
-		}
 		s.instance.OnPreload()
 		log.Info(fmt.Sprintf("service %s preloaded", s.name))
 	}
diff --git a/modular/service.go b/modular/service.go
index 55b443ee..eea158bf 100644
--- a/modular/service.go
+++ b/modular/service.go
@@ -4,6 +4,13 @@ import "reflect"
 
 // Service 模块化服务接口，所有的服务均需要实现该接口，在服务的生命周期内发生任何错误均应通过 panic 阻止服务继续运行
 //   - 生命周期示例： OnInit -> OnPreload -> OnMount
+//
+// 在 Golang 中，包与包之间互相引用会导致循环依赖，因此在模块化应用程序中，所有的服务均不应该直接引用其他服务。
+//
+// 服务应该在 OnInit 阶段将不依赖其他服务的内容初始化完成，并且如果服务需要暴露给其他服务调用，那么也应该在 OnInit 阶段完成对外暴露。
+//   - 暴露方式可参考 modular/example
+//
+// 在 OnPreload 阶段，服务应该完成对其依赖服务的依赖注入，最终在 OnMount 阶段完成对服务功能的定义、路由的声明等。
 type Service interface {
 	// OnInit 服务初始化阶段，该阶段不应该依赖其他任何服务
 	OnInit()