The website has been designed with accessibility in mind, and uses Accesskeys to make browsing more convenient. The Accesskeys used by this site are designated as follow:
Note: Use Alt for Internet Explorer accesskeys, and Shift+Alt for Firefox.
The Accesskeys used by this site are designated as follows：

• 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：Center block, providing the principal information of the page.
• Alt+Z：Bottom block, providing the principal information of the page.
• Alt+S：Search box in every page for searching this site.

← → or↑↓ : Left-right or up and down keys to move the tab order.
Home or End→ : Can directly jump to label the first or last.
Tab : Stay on the label, you can use Tab to browse the contents of that data, when faced with the radio buttons ← → or ↑ ↓ keys to move the order of items .
Tab + Shift : Press Tab + Shift to jump back on the amount of information; when you jump back to label the project can continue to use the ← → or ↑ ↓ keys to move the tab order.