Is it necessary to pay social security at your own expense?

I think whether I need to pay social security at my own expense depends on my personal situation.

For those who have no fixed employers or freelancers, paying social security at their own expense can protect their social security rights and avoid financial difficulties.

For migrant workers, temporary workers or part-time workers, paying social security at their own expense can increase social security records and improve their treatment.

You don't have to pay social security at your own expense if you have a fixed employer to pay social security.