If you buy a car with the credit card itself, there is no problem across provinces.
If you want to buy a car by stages, then you need the sub-branch in the area where the landlord buys the car to be consistent with the credit card issuer.
It should be noted that the issuing bank of general credit card is the same as the province where the landlord handles the card (if the website handles the card, you should choose the province and city). Of course, CCB has also set up some cities as branches, such as Shanghai, Beijing, Tianjin, Chongqing, Suzhou, Qingdao, Ningbo, Dalian, Three Gorges and Shenzhen (these branches will be listed in CCB official website).
So suppose the landlord issues a card in Nanjing, and the issuing bank of this card is Jiangsu Branch, and the installment of the landlord's car purchase can be handled in any city in Jiangsu Province except Suzhou.
If the landlord has other questions, you can ask.