1. If you have a work unit, you can pay social security at the unit.
2. Urban residents who have no work units can apply for medical insurance for urban residents at their domicile.
3. If you are an agricultural registered population, you can participate in the new rural insurance at the place where you are registered. At present, some areas have merged urban residents' pension, medical insurance and new rural insurance into urban and rural pension and medical insurance. You can take part in this. The 60-year-old pension is higher than the new rural insurance.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.