Because the temporary line is actually just a credit line given by the bank for a certain period of time (generally not more than three months), and the installment payment is divided into at least three installments. If the temporary quota can be phased, it will increase the risk of banks, so most banks will not open temporary quotas in stages.
In addition, it is necessary to remind the landlord that when the temporary quota expires, if the landlord uses this temporary quota, the amount owed in the landlord's card will be greater than the fixed quota and thus exceed the limit. Some banks will have an overrun fee (the CCB I use does not charge). Moreover, according to different banks, the over-limit amount may be included in the minimum repayment amount, and attention should be paid to repayment.
If the landlord has other questions, you can ask.