The website is built on the principle of accessible web development guidelines, the website main content is divided into two major blocks.
                1. Top function block 2. Central content block
                The website accesskey are set as follows:
                Alt+U:Top function block, include home, browse, search etc.
                Alt+C:Central content block, the page main content block. When the website items can't click with mouse, you can use the following keyboard operation to browse the data.
                ← → or ↑↓:Press the left, right, up, down button to move.
                Home or End→:Move to the first or last item.
                Tab:After staying at the item, you can use the Tab key to jump to the content to view the data.
                Tab + Shift:Prewss Tab + Shift key can back to the previous data.
              
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