From the current practice of China's social insurance system, what does China's social insurance system include? It mainly includes the following five specific systems: (1) social insurance premium collection system: the social insurance premium collection system is a system specially established to standardize the collection of social insurance premiums including basic old-age insurance premiums, basic medical insurance premiums and unemployment insurance premiums, strengthen the management of social insurance premiums, and ensure the payment of social insurance premiums. The system is combined with specific social insurance types and independent of these specific systems. The establishment of social insurance premium collection system is the basic construction of China's social insurance system, which is of great significance for cultivating and promoting the establishment and development of various social insurance systems. (2) Basic old-age insurance system: The basic old-age insurance system is a social security system established to ensure the basic livelihood of urban workers after retirement. The system mainly includes the collection and payment of endowment insurance premium, individual account of basic endowment insurance, endowment insurance treatment, the use of endowment insurance fund, supervision and management, etc. (3) Medical insurance system: The medical insurance system refers to a social insurance system established to ensure the basic medical care of urban workers and make rational use of medical resources. The system mainly includes coverage and payment methods, basic medical insurance funds and personal accounts, management and supervision mechanism of basic medical insurance funds, and management of medical service institutions. (4) Unemployment insurance system: The unemployment insurance system is a social security system established to ensure the basic livelihood of the unemployed during unemployment and promote the reemployment of the unemployed. This system mainly involves the establishment and management of unemployment insurance fund and unemployment insurance benefits. (5) Work-related injury insurance system: Work-related injury insurance system is a social security system that guarantees workers' rights to medical treatment, economic compensation and vocational rehabilitation after suffering from accidents and occupational diseases at work, disperses work-related injury risks and promotes work-related injury prevention. Including the scope and identification of work-related injuries, labor appraisal and disability assessment, work-related injury insurance benefits, the establishment and management of work-related injury insurance funds, work-related injury prevention and vocational rehabilitation. (6) Maternity insurance system: Maternity insurance system is a social security system established to safeguard the legitimate rights and interests of female workers and ensure that female workers get necessary economic compensation and medical care during childbirth.