The 2020 national energy work conference was held in Beijing recently! Zhang Jianhua, Secretary of the Party group and director of the national energy administration, made a report entitled "in depth implementation of the new energy security strategy to provide a strong impetus for the decisive victory of building a moderately prosperous society in an all-round way". Zhang Jianhua pointed out that "the national" 2 + 26 "key cities' clean heating rate reaches 75%". In 2019, the new clean heating area is about 1.5 billion square meters, the clean heating rate reaches 55%, and the cumulative replacement of scattered burning coal is about 100 million tons. " The achievements of clean heating in China are closely related to the subsidy policies related to the transformation of coal to electricity.