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This website is designed in accordance with the principle of "Accessible Website Development Specification", the main content of the website is divided into three major blocks::

1. The function block above the upper part, 2. The central content block, 3. Downfinder block.

This website follows the norms of accessible website design to provide web guide bricks (: :), Site Navigator, keyboard quick key (Access Key). The following is a keyboard quick key (Access Key) operation mode:

Alt+U (IE), Alt+Shift+U (Firefox):Above the main single joint area.

Alt+C (IE), Alt+Shift+C (Firefox):Main content display area, this block presents web page content.

Alt+Z (IE), Alt+Shift+Z (Firefox):Single selection area below.