diff --git a/README.md b/README.md
index 346c5f4..78760cc 100644
--- a/README.md
+++ b/README.md
@@ -189,7 +189,7 @@ class AccountWechats(AccountWechatsBase):
         orm_mode = True    # 允许与ORM对象进行直接转换
 ```
 
-### 3.创建 CRUD:
+### 3.创建 CRUD (可选，不知道创建什么逻辑可以先跳过):
 ```python
 # filepath: ExamService/mooc/crud/crud_account.py
 from sqlalchemy.orm import Session