Just write according to your actual situation. Just write clearly what you used to do and which company you worked for. If the next company asks you to return your work order or something, you can just say it in person, which is understandable. There are many irregular enterprises now. You don't need to write anything in your resume. You didn't sign the contract and pay social security. It's a bit like there's no money here. I wish you find your next home soon.