The institute of Chinese Academy of Sciences is the main hall class. As a public institution directly under the central government, the Chinese Academy of Sciences has the same administrative level as the Ministry of Education. The Chinese Academy of Sciences itself is a ministerial-level unit, but its subordinate research institutes are classified as bureau-level at the administrative level. This classification is mainly based on China's administrative system, but in practice, the salary and professional title of scientific and technological researchers more determine their treatment and development path. Research Institute of China Academy of Sciences is a subordinate research institution of China Academy of Sciences, which plays an important role in China's scientific research and technological development. These research institutes cover mathematics, physics, chemistry, life science, earth science, materials science and other disciplines. Each research institute has its own unique research direction and advantages.