Hehe, coal prices vary from place to place, with a large fluctuation range. There is no absolute price standard, but there are rules to follow for pure civilian coal. It's like when we buy clothes and down jackets. Of course, the same is true for buying coal in summer, that is, the off-season. Of course, this principle only applies to our civil coal, but we should pay attention to the storage method of coal. If it is not stored properly in summer, a pile of coal will easily naturally or volatilize heat, and it will be unbearable to burn in winter.