As far as I know, the landlord can edit the short message "last four digits of 3 1 1# card number" to 95533 with the mobile phone number you left at his home, and will reply to the total bill, due repayment date, minimum repayment amount and remaining unpaid amount of your CCB credit card.

Of course, CCB also provides a lot of code for this convenient query.

"The last four digits of the card number are 3 12#", and the balance found is the total debt recorded when you send a text message. If it is found to be negative, it means that there is more money in the card.

"The last four digits of 3 13# card number" can be used to inquire about the credit limit, and it will reply to your available credit card limit and available cash limit when sending a short message.

"The last four digits of the card number 3 14#" can be used to check the points, and the points will be returned to the points of this card and all CCB credit cards in your hand as of the day before sending the SMS.

It doesn't matter if the landlord finds it difficult to remember. I'll teach you the easiest way. Send "1 14" to 95533, and then you can check the contents according to the SMS reply.