Does the Bureau of Human Resources and Social Security have employee files of state-owned enterprises?

No, the official workers of state-owned enterprises have no files in the social security bureau, but the official workers' files of state-owned enterprises are kept in this unit.

Full-time employees of state-owned enterprises (including contract system) have files in the Social Security Bureau. After the enterprise goes bankrupt, the files of all regular employees (including contract system) will be transferred to the Social Security Bureau, so that retirees can go through retirement procedures at any time according to the files.