Can a person pay two copies of social security in the same area? Please elaborate.

Yes, as long as you cross the region, no one will refuse you. However, you should be clear that the national laws of our country clearly stipulate that the same person is only allowed to enjoy an old-age security for life. For this reason, the country has formulated very strict systems and measures, which will not give you double protection. So in the end, you will be forced to give up one, and the economic loss is your own.

The social security of the two places is merged, and the overlapping part is not allowed to merge. If they are not allowed to merge, they have to give up. This is also one of the systems and measures.

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