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materiel ：

1. One copy markdown file :

    Concrete realization ：
   3.  Add connection Association in the original text `<a href="#info">  Radar information </a>`
   4.  The link points to the position to increase the association relationship `<a id="info"> Radar information </a>`
   
    Examples of the original text ：
   ```markdown
   | Parameters | type | describe 
   |:----:|:----:|:----|
   |code|Int|__ Field description ：__  Interface response status  <br> __ Value range ：__ 0： success 
   |data|Object|__ Field description ：__  Radar information  <br> __ Value range ：__  Radar information object , Reference resources <a href="#info">  Radar information </a>
   |msg|String|__ Field description ：__  Interface response information  <br> __ Value range ：__  character string 
   
   * <a id="info"> Radar information </a>
   

2. Firefox
3. Markdown Viewer Webext Plug in Baidu download link Extraction code ：7ba0

Specific steps ：

1. Open Firefox
2. install Markdown Viewer Webext plug-in unit , Restart the browser after installation 4. Open with browser mardown file , Use the built-in function of the plug-in to save as HTML;
   5. Print using browser （ctrl+P） function , Save as PDF