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content/posts/test/hello_world/index.en.md

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+---
+title: "hello world"
+date: 2024-05-25
+lastmod: 2024-05-30
+draft: false
+description: "a description"
+categories: ["test"]
+tags: ["welcome", "example", "test"]
+series: ["test"]
+series_order: 1
+---
+{{< katex >}}
+{{< typeit
+  tag=h2
+  loop=true
+>}}
+Hello world!
+{{< /typeit >}}
+
+ an example to get you started
+
+## This is a heading
+
+### This is a subheading
+
+#### This is a subsubheading
+
+##### This is a subsubsubheading
+
+~~This is a paragraph~~ with **bold** and *italic* text.
+`Check` more at [Blowfish documentation](https://blowfish.page/)
+undefined
+
+- [ ] test1
+- [x] test2
+  - [ ] test22
+  - [x] test23
+
+1. item1
+2. item2
+3. item3
+   1. item3a
+   2. item3b
+
+> We're living the future so
+> the present is our past.
+
+---
+
+## code
+
+```c {.line-numbers}
+#include <stdio.h>
+
+int main() {
+    printf("Hello, world!");
+    return 0;
+}
+```
+
+```python
+print('hello')
+```
+
+## table
+
+| a   | b   |
+| --- | --- |
+| one | two |
+| 3   | 4   |
+
+## math
+
+$$
+\sum_{i=2}^ni=\frac{n(n+1)}{2}-1
+$$