- This website is based on the design principle of accessibility and uses keyboard shortcuts to strengthen the browsing convenience Layout is divided in 4 areas：
- 1. the main menu zone at the top、2. the content zone at the center、3. the menu zone on the right side、4. the related information zone at the bottom
- The following keys are set as the Access keys ( or speed keys) of this website.：
- Alt+U：Upper block, containing the links to the services of this site, search box, font size setting and versions of this site.
- Alt+C：Main content area shows the content of each page.
- Alt+Z：Bottom Link area.