This website is built based on the principles of accessible web design, and the main content of the website is divided into three main blocks:：

1. Header function block
2. Center content block
3. Bottom function block

The access keys for this website are as follows:：

• Alt+U：The upper-right function area, including Home, Sitemap, Site Search, Font Selection, etc.
• Alt+C：Center content block, the main content area of the page.
• Alt+S：Site Search
• Alt+Z：Bottom function block

If your browser is Firefox, the access keys are Shift+Alt+(access key letter), e.g. Shift+Alt+C will jump to the center block of the web page, and so on.