What does China Postal Savings Bank mean by "total pressure, less expenses and short deduction"?

Summary pressure: because you haven't made up the discount for a long time, the system will automatically give you a few more lines of summary pressure. If you want to know the specific details of the pressure, you can go to the local post office and give a detailed explanation with my ID card.

Small fee: it is a small account management fee charged by the postal service in 2009. The average daily balance in a quarter is less than 100 yuan, and 3 yuan in each quarter.

Short deduction: it is the business of postal account change notice, which is in 3 yuan every month and 30 yuan every year.