Can this be used as an Access Point?

My house is a 3-storey house
1)Modem Router is located at groudfloor, and there is a wall-LAN Port that connects to the first floor
2)First floor has the main living room, has a wall-LAN port connected from ground floor. I plan to put a powerful router/acces point here
3)Second floor, will most likely get the wifi signal from First floor

Need your advice. Thanks:)

I'm currently using Sunway Digital Wave as my ISP, they are on TIME backbone.

Does this router or other Xiaomi routers works with TIME?

Thanks for your prompt feedback

Noted with thanks.