National Natural Science Foundation of China emergency projects belong to the national level. The Natural Science Fund is a general theoretical scientific research, which can be divided into categories. According to the funding categories, the Natural Science Fund can be divided into general projects, key projects, major projects, major research plans, National Science Fund for Distinguished Young Scholars, and collaborative research with overseas, Hong Kong and Macao young scholars. Funds, innovative research group science funds, national basic science talent training funds, special projects, joint funding fund projects, and international cooperation and exchange projects.