diff --git a/day06/userapp/main.go b/day06/userapp/main.go
index 7572f0e..e2a2790 100644
--- a/day06/userapp/main.go
+++ b/day06/userapp/main.go
@@ -1,7 +1,37 @@
 package main
 
-import "fmt"
+import (
+	"fmt"
+	"os"
+
+	// userapp 是工程名称
+	// models 是 userapp 下的一个包，包含了用户相关的结构体和函数
+	//如果models 下面还有其他包，那么需要在这里继续导入 userapp/models/user, models/user 才是才是包名称
+	// 导入顺序 models.init(userapp/models/user.go init函数) -->  common.init(userapp/models/common/base.go init函数)
+	// init 执行顺序 models.init <-- common.init
+	"userapp/models"
+
+	// utils 包包含了一些工具函数
+	// utils.init(userapp/utils/validators.go init函数)
+	"userapp/utils"
+)
 
 func main() {
 	fmt.Println("hello user app")
+
+	// 创建用户
+	user := models.NewUser("张三", "zhangsan@example.com", 25)
+	user.ID = 1
+
+	if ok := utils.ValidateEmail(user.Email); !ok {
+		fmt.Println("邮箱格式错误")
+		os.Exit(1)
+	}
+
+	if ok := utils.ValidateAge(user.Age); !ok {
+		fmt.Println("年龄格式错误")
+		os.Exit(1)
+	}
+
+	fmt.Printf("用户创建成功：%+v\n", user)
 }
diff --git a/day06/userapp/models/README.md b/day06/userapp/models/README.md
new file mode 100644
index 0000000..15d91ab
--- /dev/null
+++ b/day06/userapp/models/README.md
@@ -0,0 +1,3 @@
+# 用户模型
+
+structs 
\ No newline at end of file
diff --git a/day06/userapp/models/common/base.go b/day06/userapp/models/common/base.go
new file mode 100644
index 0000000..1f67bcf
--- /dev/null
+++ b/day06/userapp/models/common/base.go
@@ -0,0 +1,13 @@
+package common
+
+type Base struct {
+	ID        int    `json:"id"`
+	CreatedAt string `json:"created_at"`
+	UpdatedAt string `json:"updated_at"`
+}
+
+// init 函数会在包被导入时自动调用，可以用来进行一些初始化操作
+// 执行顺序： stack 结构, 最后的包 最先被执行, 只有子包的init了，才能执行父包的init
+func init() {
+	println("common 包的 init 函数被调用")
+}
diff --git a/day06/userapp/models/user.go b/day06/userapp/models/user.go
new file mode 100644
index 0000000..71ebe87
--- /dev/null
+++ b/day06/userapp/models/user.go
@@ -0,0 +1,30 @@
+package models
+
+// userapp 是工程名称
+// models 是 userapp 下的一个包，包含了用户相关的结构体和函数
+// common 是 models 下的一个包，包含了 Base 结构体
+import (
+	"fmt"
+	"userapp/models/common"
+)
+
+type User struct {
+	// 嵌套 common.Base 结构体，包含 ID、CreatedAt 和 UpdatedAt 字段
+	common.Base
+
+	Name  string
+	Email string
+	Age   int
+}
+
+func NewUser(name, email string, age int) *User {
+	return &User{
+		Name:  name,
+		Email: email,
+		Age:   age,
+	}
+}
+
+func init() {
+	fmt.Println("models 包的 init 函数被调用")
+}
diff --git a/day06/userapp/utils/README.md b/day06/userapp/utils/README.md
new file mode 100644
index 0000000..ee2b84a
--- /dev/null
+++ b/day06/userapp/utils/README.md
@@ -0,0 +1,2 @@
+# 工具函数
+
diff --git a/day06/userapp/utils/validators.go b/day06/userapp/utils/validators.go
new file mode 100644
index 0000000..f2cf6d8
--- /dev/null
+++ b/day06/userapp/utils/validators.go
@@ -0,0 +1,32 @@
+// Copyright 2024 The Cockroach Authors.
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.txt.
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0, included in the file
+// licenses/APL.txt.
+//
+// Package utils contains utility functions.
+
+package utils
+
+import (
+	"fmt"
+	"strings"
+)
+
+// ValidateEmail 验证邮箱格式
+func ValidateEmail(email string) bool {
+	return strings.Contains(email, "@")
+}
+
+// ValidateAge 验证年龄范围
+func ValidateAge(age int) bool {
+	return age > 0 && age < 150
+}
+
+func init() {
+	fmt.Println("utils 包的 init 函数被调用")
+}