Why does Guangzhou pay social security directly?

Guangzhou is a city under the jurisdiction of Guangdong Province. According to relevant public information, there are municipalities directly under the central government and other administrative divisions in Guangdong Province. In order to coordinate security and facilitate management and service, a provincial social security agency was established to directly manage social insurance business. Guangdong social security refers to social insurance institutions directly managed by municipalities directly under the Central Government of Guangdong Province or other administrative divisions, and the social insurance it manages covers many types of insurance, such as endowment insurance, medical insurance, unemployment insurance and industrial injury insurance.