How does CCB agree to let the Social Security Bureau recognize the bought-out internal historical length of service?

Prove the length of service to the social security bureau with a buyout agreement. According to the relevant information released by Ministry of Human Resources and Social Security, the buyout agreement has the name of the company, and there will be a clear record of which year you entered the factory, which year you bought out, and what you did. Use the buyout agreement to prove the length of service to the social security bureau, and the social security bureau will identify it in combination with the file.