Article From:https://www.cnblogs.com/coolwhite/p/9061980.html

Problem Description: at the beginning, it was impossible to display, then added 4221 and 4222. in IPv4 DNS, but it was too slow to open.

 

Solution:

 

If you manually set up DNS, you can solve the problem of unable to open web pages, indicating that there is a problem with the local domain name resolution.

 

It is recommended to contact your telecom operator to confirm if there are any related problems.

 

4.2.2.1And 4.2.2.2 is the DNS server address abroad, so it will lead to slow Web page opening.

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