Is it possible to make up for not paying social security at the beginning of the month and at the end of the month? What is the time to make up the payment?

The rules vary from place to place, some places can make retroactive contributions within a quarter. Some places can make up the contributions together with the next month. In some places, you have to make timely contributions on a monthly basis, and you need to pay a certain amount of penalty before you can make the retroactive contributions. Specifically you should go to the local social security management organization to consult the implementation.