This website has been designed in compliance with general principles of accessible design:

1. Every page on the site can be navigated via the keyboard, without any need for a mouse.
2. The website features accesskeys (:::) that visitors can use to jump to the main sections of the site.
3. All images on the website are tagged with descriptive text.
4. Descriptive text pops up whenever the user hovers the cursor over a link, so that the user can see what links lead to without actually clicking into them.

The accesskeys, also known as shortcut keys, are defined as follows:

Alt+U：Top block

Alt+C：Main content

Alt+L：Left block, containing the links to the major sections and navigation of this site.

Alt+Z：Bottom block

If your browser is Firefox, Press Shift + Alt + Key to jump. For example, press "Shift + Alt + C" to jump to the center of the page.

When the tab items on this website cannot be selected with a mouse, you can navigate the content using the following keyboard operations.

← → or ↑↓ ：Use the left/right or up/down arrow keys to move between tabs.

Home or End→：You can jump directly to the first or last tab.

Tab：After staying on a tab, you can press the Tab key to move to the content and view the information.When encountering a tab control, press Enter to view its content or Tab to the “X” button and press Enter to close it.When encountering radio buttons, use the ← → or ↑ ↓ arrow keys to navigate between options.

Tab + Shift：Press Shift + Tab to go back to the previous item.When you return to the tab list, you can continue to use the ← → or ↑ ↓ arrow keys to navigate between tabs.

Alt+Z：Bottom function section and footer.