What is the nature of ensuring coal supply for other purposes?

Ensuring the supply of coal for other purposes is to ensure the nature of the coal supplied, and an agreement to ensure the supply should be signed. The difference between guaranteed coal and commercial coal is that guaranteed coal is used for heating residents according to the needs of national power plants, while commercial coal is used for steel mills and enterprises. Coal mine supply guarantee is the most basic guarantee and control of coal mine procurement cost. Guaranteed supply is the most basic guarantee and control of procurement cost.