1, website revision: website revision or update will cause inaccessible phenomenon, so I suggest you try again later. 2. System crash: Because a large number of people use the website at the same time, the unstable system server will cause a temporary crash site, and then try logging in to avoid the peak period. 3. Network and browser problems: ① Check whether there is a computer problem, you can try installing a third-party browser (such as Google browser and Firefox browser) first, but if not, reinstall the operating system and try reinstalling the driver. (2) check whether there is a network problem, try switching networks and opening this website. If you can surf the Internet normally, check what network you are using. If you can't open it, it depends on what network you are using. If an operator's network cannot be opened, please contact the operator's official customer service and ask for a solution.