When you graduate from college, in addition to the one kept in the school archives, there is also a sealed one, which is usually transferred to the personnel department of your work unit as your personnel file. If your company doesn't accept it, you can try to put it in the talent exchange center in your city and pay some management fees. If there is any job change in the future, report to the center in time and register. When you need to issue a work experience certificate after graduating from college, you can find a center to issue it.

If you don't, you may find a good company willing to accept you in the future. When you ask for proof of work experience, you may not be able to provide proof if your previous work has changed frequently.