What's the difference between Tongmei and Mengmei in Qinhuangdao? Can you tell with the naked eye?

There are obvious differences in quality and appearance between Tongmei and Mengmei in Qinhuangdao.

Datong coal, also known as Datong coal, has high calorific value, generally above 6000 kcal/kg, and bright colors. Mongolian coal, mainly produced in Inner Mongolia, has a relatively low calorific value, generally around 5500 kcal/kg, and its color is black.

Although it may be difficult to accurately distinguish the same kind of coal from Mongolian coal by naked eye observation, its type can be preliminarily judged by understanding its source and characteristics. For ordinary consumers, if there is no professional testing equipment, they can make a preliminary distinction according to the origin and color of coal.

The above information is for reference only. If necessary, it is recommended to consult a professional.