Hunan province pays social security in one lump sum.

You can't pay social security in one lump sum now. You can pay the retirement age at the social security bureau where the household registration is located according to the standards of flexible employees. If the payment has not been made after the retirement age 15 years, you can continue to pay for 5 years, which is equivalent to delaying retirement for 5 years. If you still don't pay 15 years after five years, you can pay the insufficient number of years at one time.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.