Three days. If buying a second-hand house is a loan to buy a house, you need to sign a mortgage contract and ask for leave, because the bank and the provident fund are working days and need to be completed during working hours. After waiting for the approval of the bank, it is necessary to transfer the ownership, which also needs to be completed on the working day. Then make a loan, which is usually completed during working hours on weekdays. Need to apply for a loan to buy a house, need to take at least 3 days off.