diff --git a/README.md b/README.md
index 95f0647..b481c89 100644
--- a/README.md
+++ b/README.md
@@ -197,3 +197,10 @@ type User struct {
 ```
 
 Use Buffalo pop `Soda CLI` to create database migrations.
+
+### 2024/10/07
+
+Implement the architecture design for User entity.
+
+Checked out OpenAPI, and found that it was not that simple at all. It needs
+a whole package of knowledge about the web development!