His credit card has many card number segments, not all of which start with these 8 digits (but as far as I know, there should be this card number segment). The card starting with 5324 should be the MasterCard-UnionPay dual-currency card of CCB. If the landlord needs to check the specific card number of the credit card under his name, he can also bring his ID card to the financial counter of the nearest outlet for confirmation.

If the landlord has other questions, you can ask.