Different from light-duty vehicle using diverse fuel (e.g. gasoline, diesel, CNG, and electric), heavy-duty vehicle uses diesel or LNG because the fuel’s energy density must be high enough to meet its power requirement. There are three main types of LNG heavy-duty vehicles in Shenzhen, namely, container tractors, engineering dump trucks, and engineering mixers.http://en.chtc-evemex.com/natu....ral-gas-vehicles/lng