Social security unit. The tax bureau is the government agency in charge of tax work, which undertakes the responsibility of tax and non-tax revenue collection and management within its jurisdiction, and needs to go to the social security unit to receive pensions from the tax bureau. In order to improve the efficiency of the collection and management of social insurance funds, various social insurance premiums such as basic old-age insurance premiums, basic medical insurance premiums and unemployment insurance premiums are handed over to the tax authorities for unified collection.