It is responsible for the production, transmission, distribution, and sales of electrical energy, involving multiple power generation forms such as thermal power, hydropower, wind power, and photovoltaics. As the "power source" of the national economy, it supports the electricity demand for production and life of the whole society. Currently, it focuses on the adjustment of the energy structure, accelerating the replacement of clean energy, building a smart grid, improving the safety, reliability, and greening level of the power system, and ensuring the sustainable supply of energy.