This website is based on the design principle of accessibility and uses keyboard shortcuts to strengthen the browsing convenience. Layout is divided in five areas：
Top-main area, midst-content area,Left-selection area,right-selection area and bottom-related information area.
Accesskey guided as below:
Alt+U: Links on the top area, there are covering all kinds of languages script and main items.
Alt+C: Main content area shows the content of each page.
Alt+L: Links on the left area include the sub-connections of individual.