I got a job in 58 cities. Because your resume is unlimited, others can see or search your resume and call you because they think you meet their recruitment requirements initially. As for whether the work unit is formal, you should know for yourself, such as business license, labor contract, salary, work content, method, place and time. If you think this job is not what you want, you have the right to refuse. If this is what you want, try to get it.
Finally, I wish you good luck in your work!