The code B030505 of the National Natural Science Foundation of China stands for: In the natural science classification catalogue applied by the National Natural Science Foundation of China (the following categories are arranged in descending order, so you should be able to understand them), the related knowledge of physical chemistry (B03), colloid and interface chemistry (B0305) and molecular assembly and aggregation (B030505) of the Ministry of Chemical Industry is developed as follows: The subject classification catalogue of the National Natural Science Foundation of China is applied by the National Natural Science Foundation of China. Classification divides natural sciences into seven categories: A. Mathematical Science Department: A0 1 Mathematics, A02 Mechanics, A03 Astronomy, A04 Physics I, A05 Physics II B. Chemical Science Department: B0 1 Inorganic Chemistry, B02 Organic Chemistry, B03 Physical Chemistry, B04 Polymer Chemistry, B05 Analytical Chemistry, B06 Chemical and Industrial Chemistry, B07 Environmental Chemistry C. Life Science Department: C0 1 Basic Biology, C02 Agricultural Science, C03 Medicine and Pharmacy D, Earth Science Department: d066 D03 Geochemistry, D04 Geophysics and Space Physics, D05 Atmospheric Science, D06 Marine Science E, Engineering and Materials: E0 1 Metal Materials, E02 Inorganic Nonmetallic Materials, E03 Organic Polymers. E04 Metallurgy and Mining, E05 Mechanical Engineering, E06 Engineering Thermophysics and Energy Utilization, E07 Electrician, E08 Building Environment and Structure Engineering, E09 Water Conservancy F, Information Science Department: F0 1 Electronic and Information System, F02 Computer Science, F03 Automation Science, F04 Semiconductor Science, F05 Optical and Photoelectric Management Science Department: G0 1 Management. G02 Business Administration, G03 Macro-management and Policy National Natural Science Fund: In the early 1980s, in order to promote the reform of China's science and technology system and change the allocation mode of scientific research funds, 89 academicians of the Chinese Academy of Sciences wrote to the CPC Central Committee and the State Council, suggesting the establishment of the National Natural Science Fund, which was approved by the CPC Central Committee and the State Council. Subsequently, with the cordial care of Comrade Deng Xiaoping, the State Council approved the establishment of the National Natural Science Fund Committee in February 1986. The Natural Science Foundation insists on supporting basic research, and gradually forms and develops a funding pattern consisting of three series of research projects, talent projects and environmental conditions projects. In the past twenty years, the Natural Science Foundation has made great achievements in promoting the development of basic research of natural science in China, promoting the construction of basic disciplines, and discovering and cultivating outstanding scientific and technological talents. Super professional answer, please adopt it as the best answer if you are satisfied, thank you!