Background
Markdown is used very frequently in documentation and README. It is very neccessary to summarize the common syntax and usage.
Basic Syntax
Titles
# This is the first level title
## This is the second level title
### This is the third level title
#### This is the fourth level title
##### This is the fifth level title
###### This is the sixth level title
Fonts
*Italic*
**Bold**
***Italic Bold***
~~Strikethrough~~
`Highlight`
Reference
>This is the content of the citation
>>This is the content of the citation
>>>This is the content of the citation
Dividing Line
---
----
***
*****
same effect
Picture

example:

Hyperlink
[Hyperlink_name](Hyperlink_addr "Hyperlink_title")
Hyperlink_title is optional
Example:
[Google](http://google.com)
[Baidu](http://baidu.com)
Unordered List
can use any type of -
+
*
, need to add space after it. the effect is same.
- list content
+ list content
* list content
number with dot, need to add space after the dot.
1. first line
2. second line
3. third line