The running water difference can be calculated by the total bill revenue-the bill amount paid. Running water balance = total bill revenue-paid bill amount, and the rest is total running water balance. Save more and take less, save 1000 and take 500, otherwise it is invalid, and the expenditure is greater than the income. 2. For credit loans, the deposit time and amount are fixed. 3. If the salary is in the form of cash, and the bank flow cannot reflect the salary income of the transferee, please deposit a fixed amount at a fixed time, which can also reflect the effective part of the deposit and withdrawal within 4.24 hours, that is, the deposit and withdrawal cannot be made on the same day.