diff --git a/_posts/2024-03-12-add-uses.md b/_posts/2024-03-12-add-uses.md
index 2928df6..8e524da 100644
--- a/_posts/2024-03-12-add-uses.md
+++ b/_posts/2024-03-12-add-uses.md
@@ -1,8 +1,8 @@
 ---
 title: Add Uses
-date: 2024-03-12 23:00:00 +0900
+date: 2024-03-12 23:30:00 +0900
 #categories: [TOP_CATEGORIE, SUB_CATEGORIE]
 tags: [Uses] # TAG names should always be lowercase
 ---
 
-Add My uses page.
+Add My [uses](https://long-910.github.io/posts/add-uses/) page.
diff --git a/_posts/2024-03-12-hello-world.md b/_posts/2024-03-12-hello-world.md
new file mode 100644
index 0000000..8eac70c
--- /dev/null
+++ b/_posts/2024-03-12-hello-world.md
@@ -0,0 +1,18 @@
+---
+layout: post
+title: Hello World
+date: 2024-03-12 23:00:00 +0900
+category:
+author:
+tags: [C]
+summary:
+---
+
+```c
+#include <stdio.h>
+
+main( )
+{
+    printf("hello, world\n");
+}
+```