China social security system is a comprehensive framework of social protection programs that covers various aspects of social welfare, such as pension, health care, unemployment, work injury, maternity, and disability. The system aims to provide basic income security and health care for the population, especially for the vulnerable groups, such as the elderly, the sick, the disabled, and the unemployed. The China social security system is regulated by different laws and regulations, and administered by different government agencies at various levels. The system is financed by contributions from employers, employees, and the government, as well as by investment income and fiscal subsidies. The system faces many challenges, such as low coverage, insufficient funding, regional disparities, and demographic changes. This archive contains a collection of articles that analyze various aspects of China social security system, such as its history, development, reform, current situation, and future prospects. The articles provide insights into the policies, practices, and issues of China social security system from different perspectives and disciplines. The articles also offer comparative analysis and international experience that can help improve the understanding and evaluation of China social security system.