Does Xinjiang semi-trailer make money by pulling coal overload?

Xinjiang tractor semi-trailer overloaded to earn money. Domestic coal transportation is rich, and large trucks earn more by pulling coal, with an average salary of 20 thousand yuan a month. Semi-trailer refers to a trailer whose axle is placed behind the center of gravity of the vehicle (when the vehicle is uniformly loaded) and equipped with a coupling device that can transmit horizontal and vertical forces to the tractor.