What does this mean? If it is a Xiaomi device, it is not a Microtik and vice versa. Not sure how installing OpenWrt changes the device from one manufacturer to another.
If you are running OpenWrt, the username is root and there is no password in the default installation.
Unplug all network connections from the router and the PC and turn off wifi on your PC. Connect one cable from the LAN port of your router to the PC and try again.
There is no way that a Xiaomi device will run RouterOS from Microtik. And there is also no way that installing an official OpenWrt image will result in RouterOS being loaded on any device.
Unplug your Xiaomi device and then connecting to 192.168.1.1 on the web browser again... if it still works, you have an active network connection somewhere that has a 'Tik router.
I will tell u more Infos,
I was running an old snapshot version so I updated it 1 hour ago after that when I connect to the router it gives me this UI
also, I reset the router 2 times
so what's the prob?
and I tried disconnecting all LAN cables from the router and connecting only the PC and the same thing so it's most likely got flashed routeros that I downloaded from here
We know, conclusively that the Xiaomi router cannot possibly respond at all because it is physically powered off, right? Therefore, as I have said, the Xiaomi is not running RouterOS.
Earlier I told you to disconnect ALL network connections from your PC and to turn off Wifi. And I said you also need to disconnect all connections from your Xiaomi router (other than power), and then make just one connection between the Xaiomi router and your PC. Did you do this?