diff --git a/src/main/java/com/knowledge/base/domain/user/model/UserDO.java b/src/main/java/com/knowledge/base/domain/user/model/UserDO.java
index c655c58..71d7ae1 100644
--- a/src/main/java/com/knowledge/base/domain/user/model/UserDO.java
+++ b/src/main/java/com/knowledge/base/domain/user/model/UserDO.java
@@ -2,6 +2,8 @@ package com.knowledge.base.domain.user.model;
 
 import lombok.Data;
 
+import java.time.LocalDateTime;
+
 /**
  * @author Luke.ye
  * @date 2025/6/9 10:36
@@ -9,8 +11,9 @@ import lombok.Data;
 
 @Data
 public class UserDO {
-    public Long id;
-    public String username;
-    public String password;
+    private Long id;
+    private String username;
+    private String password;
+    private LocalDateTime addTime;
     // 领域层需要的字段，可适当扩展
 }
diff --git a/src/main/java/com/knowledge/base/infrastructure/converter/UserDtoConverter.java b/src/main/java/com/knowledge/base/infrastructure/converter/UserDtoConverter.java
index a619413..77e2e14 100644
--- a/src/main/java/com/knowledge/base/infrastructure/converter/UserDtoConverter.java
+++ b/src/main/java/com/knowledge/base/infrastructure/converter/UserDtoConverter.java
@@ -4,11 +4,16 @@ import com.knowledge.base.domain.user.model.UserDO;
 import com.knowledge.base.infrastructure.north.dto.user.UserDTO;
 import org.springframework.beans.BeanUtils;
 
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
+
+
 /**
  * @author Luke.ye
  * @date 2025/6/9 09:44
  */
 public class UserDtoConverter {
+    private static final DateTimeFormatter DTF = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
     public static UserDO toDO(UserDTO dto) {
         if (dto == null) return null;
         UserDO doObj = new UserDO();
@@ -19,6 +24,7 @@ public class UserDtoConverter {
         if (doObj == null) return null;
         UserDTO dto = new UserDTO();
         BeanUtils.copyProperties(doObj, dto);
+        dto.setAddTime(doObj.getAddTime() == null ? null : doObj.getAddTime().atZone(ZoneId.of("Asia/Shanghai")).format(DTF));
         return dto;
     }
 }
diff --git a/src/main/java/com/knowledge/base/infrastructure/north/dto/user/UserDTO.java b/src/main/java/com/knowledge/base/infrastructure/north/dto/user/UserDTO.java
index f52685f..d9e254d 100644
--- a/src/main/java/com/knowledge/base/infrastructure/north/dto/user/UserDTO.java
+++ b/src/main/java/com/knowledge/base/infrastructure/north/dto/user/UserDTO.java
@@ -9,6 +9,7 @@ import lombok.Data;
 
 @Data
 public class UserDTO {
-    public Long id;
-    public String username;
+    private Long id;
+    private String username;
+    private String addTime;
 }