diff --git a/backend/src/main/java/com/kob/backend/pojo/Bot.java b/backend/src/main/java/com/kob/backend/pojo/Bot.java
index 0517f3f..478c15d 100644
--- a/backend/src/main/java/com/kob/backend/pojo/Bot.java
+++ b/backend/src/main/java/com/kob/backend/pojo/Bot.java
@@ -14,21 +14,22 @@ import java.util.Date;
 @AllArgsConstructor
 @NoArgsConstructor
 public class Bot {
-//    主键自增
+    //    主键自增
     @TableId(type = IdType.AUTO)
     private Integer id;
 
-//    注意：在pojo中需要定义成userId，在queryWrapper中的名称仍然为user_id
+    //    注意：在pojo中需要定义成userId，在queryWrapper中的名称仍然为user_id
     private Integer userId;
     private String title;
     private String description;
     private String content;
     private Integer rating;
-//    pojo中定义日期格式的注解：@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
-    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
+    // pojo中定义日期格式的注解：@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
+    // timezone 用于修改时区
+    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "Asia/Shanghai")
     private Date createtime;
 
-    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
+    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "Asia/Shanghai")
     private Date modifytime;
 
 }