Why can't some construction banks in Tianjin change their social security cards?

Some construction banks in Tianjin can't change their social security cards because small branches don't support them. According to the relevant public information of the survey, social security cards are handled by the Social Security Bureau and China Construction Bank, and this kind of business can only be handled at larger service points. Social security card (hereinafter referred to as social security card) is an integrated circuit card (cpu card) which is uniformly planned by Ministry of Human Resources and Social Security and issued to the society by local human resources and social security departments.