State-owned enterprises are the pillars of our national economy. At present, the contribution rate of state-owned economy to GDP is around 30%. Central enterprises are the main force of state-owned enterprises in China. In China, according to the use of state-owned assets, they can be divided into operating assets and non-operating assets. Operating assets can be divided into central enterprises and local enterprises according to government management authority. Central enterprises in a broad sense include three categories: first, enterprises managed by the State Council State-owned Assets Supervision and Administration Commission, which are divided into those that provide public goods, such as military industry and telecommunications; Providing natural monopoly products, such as oil; Provide competitive products, such as general industry, construction and trade. Second, the enterprises managed by CBRC, CIRC and CSRC belong to the financial industry. Third, enterprises managed by other departments or mass organizations in the State Council belong to tobacco, gold, railway passenger and freight transportation, ports, airports, radio and television, culture, publishing and other industries.