According to the types of funding, the Natural Science Fund can be divided into general program, key projects, major projects, major research programs, National Science Fund for Outstanding Young Scholars, Cooperative Research Fund for Overseas and Hong Kong and Macao Young Scholars, Scientific Fund for Innovative Research Groups, National Basic Science Talent Training Fund, special projects, joint fund projects, and international (regional) cooperation and exchange projects. Some funding categories can be further refined through subcategory descriptions and notes. All of these funding categories have different priorities and complement each other to form the current natural science funding system.