This site is committed to suring that its site is accessible to all users. The accesskeys used by this site are designated as an alternative for people with disabilities.
　　　　The content of this website divides into four blocks: (1) The upper block, (2) The left block, (3) The center block, and (4) The bottom block. The Accesskeys, keyboard shortcuts, used by this site are designated as follows:

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Alt+U：The upper block, containing the links to the major sections and services of this site.
Alt+L : The left block, containing our some introductions and some relative links.
Alt+C：The center block, the content of the left block area.
Alt+G：The bottom block, containing the information of related links and copyright of this site.