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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
Left-selection area
midst-content 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.
