Should the company return the work order when paying social security?

Your question is more complicated. First, it depends on whether your first company really paid you social security. If yes, check how much has been paid and see if the employment permit has been processed. If yes, where is the employment permit? Generally, it is necessary to apply for an employment permit and pay social security, which is unified throughout the city. Second, it is unreasonable for the current unit to ask you to provide a refund form. I guess they're trying to avoid social security. As long as you provide an employment permit to pay social security, people from other places can apply for an employment permit directly. Third, it has something to do with whether you are not a local and whether you will graduate this year ~

I hope I can help you, and I hope to adopt it!

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