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This site is built based on accessible web development guidelines, the website can be divided into three blocks:
1. Upper functional block, 2. Central content block, 3. Lower functional block.
Accesskey settings：
Alt+U：Functional blocks on the upper right, including home page, websites navigation, website search, font selection, etc.
Alt+C：The central content area is the main content area of this page.
Alt+Z：Function block below.
If your browser is Firefox, the accesskey is Shift+Alt+ (shortcut letter), for example, Shift+Alt+C will jump to the central block of the webpage, and so on.