How do I check whether I have paid social security in Southwest Guizhou?

It doesn't matter if you cut it off first, because now social security can be calculated according to the total time. Now social security is online, and everyone has an account. After leaving the unit, they put it online, and when they have a unit, they will go online. You shouldn't go. You can call the Labor and Social Security Bureau and ask both parties. If you don't know, just call 1 14 and check the telephone number of the labor and social security bureau where you pay insurance.

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