Why have my domain names been resolved for several days? ping my younger brother, my computer, or the original IP address?

Why is my domain name resolved for a few days? Can I ping my computer or the original IP address? my domain name was originally bound to 192.168.1.3 for local debugging and then bound to the IP address 222.186.50.211, after this takes effect, all other computers have already directed to this IP address. Lan, friends, and customers have all pointed to why domain names have been resolved for several days, ping my computer or the original IP address?
My domain name was originally bound to 192.168.1.3 for local debugging. later I bound it to the IP address 222.186.50.211. after this takes effect, all other computers have already directed to this IP address, lan, friends, and customers all point to 222.186.50.211.

However, my computer is still pointing to the IP address 192.168.1.3. I have restarted my computer several times, changed the IP address, and cleared the dns cache, I have repaired my computer, and I have done everything. I still keep pointing to 192.168.1.3.

Try to ping this domain name without www. but it can point to it normally. Why ??
------ Solution --------------------
Have you read the local hosts file?

Www is a subdomain name. you need to understand this concept.
If www.xxx.com and abc.xxx.com are of the same nature, they must be added to DNS. if they are not added, they will not be resolved.