Work experience The civil service examination needs to provide the certificate issued by the work unit, labor (employment) contract, social security payment list, bank or unit salary list and other relevant materials that can prove that you have been in grassroots work experience for two years. For social workers (those who apply for jobs in grassroots work experience), they must provide proof of work at the time of political examination. There are many ways to prove work experience, and the labor contract takes precedence; If there is no labor contract, it needs a written certificate issued by the original unit, and of course it needs the signature of the unit. If you change companies halfway, you can accumulate work experience, and you need to provide labor contracts or written certificates from multiple companies. Social workers (social workers) also need to provide written consent and seal of the unit. Some rural work experience or self-employed, self-employed candidates need certificates issued by local township sub-district offices and other relevant departments, and can also provide labor contracts, employment contracts or certificates of deposit payment of provident fund and social security deposit payment. I suggest you take a look at this article's more specific exposition of grassroots work experience, a civil servant. I hope it will help you, and I hope it will be adopted. Thank you!