If the weight, volume, or shape of a batch of goods needs to be transported by more than one truck, it shall be checked in as a whole vehicle. Mainly used for the transportation of bulk commodities such as coal, oil, ore, steel, coke, grain, fertilizers, chemicals, cement, etc. A batch of plastic products, metal products, industrial machinery, daily electrical appliances, fruits and vegetables, food and beverage, textiles, paper products, cultural and educational supplies, pharmaceuticals, ceramic tiles, boards and other bulk goods weighing over 40 tons or with a volume of over 80 cubic meters shall also be transported as whole vehicles. Whole vehicle transportation is the main mode of railway transportation.