There is an urgent problem with accessing REDHAT9 under the virtual machine !!!!

There is an urgent problem with accessing REDHAT9 under the virtual machine !!!! -- Linux general technology-Linux technology and application information. For details, refer to the following section. The younger brother recently came into contact with redhat 9, which was installed on a virtual machine, but a serious problem was that he could not access the internet. I also found some similar solutions on the Internet. The methods are similar .. But it won't work if I put it on my own machine .. I use the HOST-ONLY method. The configured IP address is also in the same IP address segment as the host. My machine is used in school to access the Internet through a LAN... In addition, all DNS servers are in the same row... Also changed the configuration file .. But it still does not go to the network... Especially worried .. Please help me .. Thank you very much...