The biggest role of the car is to expand the radius of people’s daily life and accelerate the speed of goods transportation. Improve the quality of life and make holiday travel more convenient. Provide possibility in case of accident requiring rapid transportation (e.g. first aid).
According to the current international practice, there are five international auto shows, including three in Europe: Frankfurt, Paris and Geneva; one in North America and one in Asia: North America and Tokyo.
A large number of car exhaust emissions caused by pollution, a large number of parking land, aggravating the urban congestion. The demand of automobile for fuel consumption of non renewable resources is very large.