If the landlord has a bank of communications credit card, but I suggest that the landlord change to another bank for a second credit card, because the credit cards of the same bank are shared. If the landlord's current credit card limit of Bank of Communications is 30,000, and the credit card limit applied for the second time is 1 10,000, then the landlord's two credit cards are always 30,000 instead of 40,000, so I suggest that the landlord change to another bank to apply for a new card. That's all I know. I hope my answer can help the landlord!