Research on risk management of social security fund 并列题名:Research on risk management of social security fund New approaches to the management of social security fund 并列题名:New approaches to the management of social security fund Research on the development of social security in Guangzhou Research on legal issues of social security fund trust Research on the risk management of commercial banks' products Research on the implementation cost of social security right Investment efficiency & risk monitoring of social security fund Research on operating regulation of social security fund in China