Do company website maintenance. I don't know why the website won't open. Business ability needs to be improved.

Generally, the reasons why this can't be opened are basically the following:

1. Domain name server problem (basically can be ruled out, domain name server problem is rare)

2. Domain name resolution problem, the domain name is not correctly resolved to the virtual host address (it may be that the recent filing is very bad, the service provider may not inform you when changing the server, and it needs to be re-resolved when changing the ip address)

Third, the problem of the virtual host server (probably due to various reasons, the virtual host is extremely stable)

4. Is the domain name bound to the virtual host (it may be that the space provider changed the ip address without informing you in time, so you can go to the virtual host control panel to re-bind).

5. Domain name filing problem (most websites may not be opened recently because of this problem, so you need to contact the space provider to solve it. Some places have a white list system, and only those who enter the white list can open it)