What does one-time payment 15 social security mean?

If you can pay 15 years in one lump sum before retirement, it is called wholesale payment. But only endowment insurance can. Dǔn: insurance terms. Batch delivery corresponds to timely payment. Wholesale delivery means paying all premiums in one lump sum. Endowment insurance in social security can only be paid for 15 years before employees retire. The minimum payment period of endowment insurance is 180 months, that is, 15 years. You can give more, and then you can get more. At the same time, the pension insurance can accumulate payment years, that is, intermittent payment is allowed. Medical insurance needs at least 25/30 years. When you reach retirement age, you can apply for pension benefits and medical reimbursement (as long as the fee is renewed, it is also possible at ordinary times).