The easy and quick access keys defined of this site as followings: Ps：IE Accesskey please
use "Alt"；Firefox Accesskey please use "Shift+Alt"。
Accesskey U：Up main botton, the website Main botton,Chinese botton and sitemap.
Accesskey L：Left menu navigation, containing the links to the major sections of this site.
Accesskey C：Center main content, providing the principal information of the page.
Tab : navigate to next link.
Shift Tab : Goback previous link.
Home : Go to top of page.
End : Go to bottom of page.