Has the company number changed after the social security card was replaced?

No. According to the information released by People's Republic of China (PRC) and Ministry of Human Resources and Social Security, the personal social security number will not change, and the country has established a national unified personal social security number, in which the personal social security number is the citizen ID number. With the change of the unit, the personal social security number and the date of enrollment remain unchanged. Social security card refers to the social security card of the People's Republic of China, which is an integrated circuit (ic) card issued by local human resources and social security departments for various business fields of human resources and social security.