diff --git a/product/product-biz/src/main/java/cn/iocoder/mall/product/biz/bo/category/ProductCategoryAddBO.java b/product/product-biz/src/main/java/cn/iocoder/mall/product/biz/bo/category/ProductCategoryAddBO.java
index 5aa2cf611..569d72d24 100644
--- a/product/product-biz/src/main/java/cn/iocoder/mall/product/biz/bo/category/ProductCategoryAddBO.java
+++ b/product/product-biz/src/main/java/cn/iocoder/mall/product/biz/bo/category/ProductCategoryAddBO.java
@@ -12,6 +12,7 @@ import java.util.Date;
  */
 @Data
 @Accessors(chain = true)
+// TODO FROM 芋艿 to 伟帆，BO 可以不加 Serializable 接口，因为没序列化的诉求哈。一般 BO 可以创建一个统一的 ProductCategory，可以把 ProductCategoryAllListBO 合并过来
 public class ProductCategoryAddBO implements Serializable {
 
     /**
diff --git a/product/product-biz/src/main/java/cn/iocoder/mall/product/biz/bo/category/ProductCategoryAllListBO.java b/product/product-biz/src/main/java/cn/iocoder/mall/product/biz/bo/category/ProductCategoryAllListBO.java
index 8b568fb51..9d6666e5e 100644
--- a/product/product-biz/src/main/java/cn/iocoder/mall/product/biz/bo/category/ProductCategoryAllListBO.java
+++ b/product/product-biz/src/main/java/cn/iocoder/mall/product/biz/bo/category/ProductCategoryAllListBO.java
@@ -12,6 +12,7 @@ import java.util.Date;
  */
 @Data
 @Accessors(chain = true)
+// TODO FROM 芋艿 to 伟帆，
 public class ProductCategoryAllListBO implements Serializable {
 
     /**
diff --git a/product/product-biz/src/main/java/cn/iocoder/mall/product/biz/dto/category/ProductCategoryAddDTO.java b/product/product-biz/src/main/java/cn/iocoder/mall/product/biz/dto/category/ProductCategoryAddDTO.java
index 237aab09d..2a78ceac3 100644
--- a/product/product-biz/src/main/java/cn/iocoder/mall/product/biz/dto/category/ProductCategoryAddDTO.java
+++ b/product/product-biz/src/main/java/cn/iocoder/mall/product/biz/dto/category/ProductCategoryAddDTO.java
@@ -15,6 +15,7 @@ public class ProductCategoryAddDTO {
     /**
      * 管理员id
      */
+    // TODO FROM 芋艿 to 伟帆：传入 Service 的，要加下 Validation 的注解，虽然 Controller 那也添加了 Validation，但是相比来说，Service 更应该被保护，嘿嘿。因为一些时候，Service 也会被别人所调用，所以要保护好自己。
     private Integer adminId;
 
     /**
diff --git a/product/product-biz/src/main/java/cn/iocoder/mall/product/biz/service/product/impl/ProductCategoryServiceImpl.java b/product/product-biz/src/main/java/cn/iocoder/mall/product/biz/service/product/impl/ProductCategoryServiceImpl.java
index ca377b6cf..7f2148fa1 100644
--- a/product/product-biz/src/main/java/cn/iocoder/mall/product/biz/service/product/impl/ProductCategoryServiceImpl.java
+++ b/product/product-biz/src/main/java/cn/iocoder/mall/product/biz/service/product/impl/ProductCategoryServiceImpl.java
@@ -18,8 +18,8 @@ import com.baomidou.mybatisplus.core.toolkit.Wrappers;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
-import java.sql.Wrapper;
-import java.util.*;
+import java.util.Date;
+import java.util.List;
 
 /**
  * @Author: jiangweifan
@@ -168,6 +168,7 @@ public class ProductCategoryServiceImpl implements ProductCategoryService {
             }
             // 父分类必须是一级分类
             if (!ProductCategoryConstants.PID_ROOT.equals(parentCategory.getPid())) {
+                // TODO FROM 芋艿 to 伟帆，ProductErrorCodeEnum 去实现下 ServiceExceptionUtil.Enumerable 接口，酱紫就不用 .getCode() 方法，代码会更简洁。同时，可以把 ProductErrorCodeEnum static import 下，
                 throw ServiceExceptionUtil.exception((ProductErrorCodeEnum.PRODUCT_CATEGORY_PARENT_CAN_NOT_BE_LEVEL2.getCode()));
             }
         }
diff --git a/product/product-rest/src/main/java/cn/iocoder/mall/product/rest/request/category/AdminsProductCategoryAddRequest.java b/product/product-rest/src/main/java/cn/iocoder/mall/product/rest/request/category/AdminsProductCategoryAddRequest.java
index a9bd29c2a..3e6c8920d 100644
--- a/product/product-rest/src/main/java/cn/iocoder/mall/product/rest/request/category/AdminsProductCategoryAddRequest.java
+++ b/product/product-rest/src/main/java/cn/iocoder/mall/product/rest/request/category/AdminsProductCategoryAddRequest.java
@@ -16,6 +16,8 @@ import javax.validation.constraints.NotNull;
 @Data
 @Accessors(chain = true)
 public class AdminsProductCategoryAddRequest {
+
+    // TODO FROM 芋艿 to 伟帆：写了 swagger 注解，我们可以少写一份 Java 注释。
     /**
      * 父分类编号
      */