Do you want to buy old-age insurance? You can bring your ID card, household registration book and photos to the Social Security Bureau to apply for purchase! ! The man who paid the old-age insurance at the latest is 45 years old and the woman is 40 years old. You can also pay more, but the minimum standard is 15 years!
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.