Since domestic ECS servers do not provide ipv6 addresses, the transition method used for adaptation may reduce access speed to a certain extent, but the overall impact is small. The current access rules are as follows: the main domain name of the site, vv1234.cn, and the external link domain name of the map bed, wx1.vv1234.cn, support dual stack access of ipv6+ipv4 by default. Considering that the vast majority of college ipv6 traffic is free and the cost of ipv4 traffic is too high, users of the education network will be forced to use the ipv6 line (the speed may be slower). Of course, because of other uncontrollable reasons, Please note that the services of other third-party manufacturers used on this site will still incur traffic charges, such as: Alibaba Cloud's CNZZ traffic statistics, ARMS