Wuxi people, 45 years old, want to pay social security for affiliated companies in order to retire at the age of 50.

The affiliated unit must pay social security for at least fifteen years before it can receive a pension. If the retirement age of the subordinate unit has reached the prescribed level and the social security has not been paid for fifteen years, it may apply for a one-time payment of social security for fifteen years before going through the retirement formalities.

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