The main content of this site is divided into two large blocks: 1) the menu link in the upper of the page 2) the main page
The Accesskey of this website are set as below:
Alt+U：The top of the page is the main menu of this website
Alt+C：The main content area of the page, this area shows the main information of the page.
Shift+Tab：Back to the previous object
Tab navigation order : From the top of the menu link to the left of the menu link, (few pages without the left side of the menu link), and then moved to the central page of the main content area.