title	author	references	description
Lorem ipsum	SprInec	typora-theme-Jinxiu	this block is YAML front matters

Lorem ipsum

In publishing and graphic design, lorem ipsum (derived from Latin dolorem ipsum, translated as "pain itself") is a filler text commonly used to demonstrate the graphic elements of a document or visual presentation. ¹

Example text

A common form of lorem ipsum reads:

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Inline styles support strong, Emphasis, code, underline, ~~strikethrough~~, 😄, $\LaTeX$, X^2^, H2O, ==highlight==, Link, and image:

level heading:

Heading 3

Heading 4

Heading 5

Heading 6

table：

table 1　Global / Chinese Desktop operating system Market share (%)

OS	Windows	macOS	Unknown	Linux	Chrome OS	Other
Global	76.56	17.1	2.68	1.93	1.72	0.01
Chinese	87.55	5.44	6.24	0.75	0.01	0.01

items:

ordered list item 1.
ordered list item 2.
- sub-unordered list item 1.
- sub-unordered list item 2.
  - something is DONE.
  - something is not TODO.

item 1
- Item 2
  - Item 3

Item 1
Item 2
1. Item 2.1
2. Item 2.2
  1. Item 2.2.1
  2. Item 2.2.2

block code:

<!DOCTYPE html>
<html>
<body>

<h1>The *= Operator</h1>
  
<p id="demo"></p>

<script>
var x = 10;
x *= 5;
document.getElementById("demo").innerHTML = x;
</script>

</body>
</html>

mermaid:

graph LR
A(start) -->
input[/input a,b/] --> if{a%b=0 ?}
if --->|yes| f1[GCD = b] --> B(quit)
if --->|no| f2["a, b = b, a % b "]-->if

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equations:

$$ \iint\limits_{x^2 + y^2 \leq R^2} f(x,y),\mathrm{d}x,\mathrm{d}y = \int_{\theta=0}^{2\pi} \mathrm{d}\theta\int_{r=0}^R f(r\cos\theta,r\sin\theta) r,\mathrm{d}r, \tag{1} $$

alter:

Tip