At present, it is autumn and winter, and the northern part of China is also in the heating period. It is not difficult to see the main reason for the recent price increase of thermal coal, that is, the price increase caused by the change of demand.

Coal is called black gold and industrial food. Since18th century, it has been one of the main energy sources used in the human world. Since the 2 1 century, although the value of coal is not as good as before, it is still one of the indispensable energy sources for our human production and life for a long time. The supply of coal is also related to the stability of China industry and even the whole society. Coal supply security is also the most important link of energy security in China.