Classification principles of heavy vehicles:
According to the standards of Chinese mainland, it is divided into mini-cars (displacement 1L or less), ordinary cars (displacement 1.0~ 1.6L), intermediate cars (displacement 1.6~2.5L), middle and high-class cars (displacement 2.5~4.0L) and medium-sized cars.
Lack of market awareness and poor price sensitivity. At that time, cars were sold according to the planned distribution mode, and the grades of cars were measured by engine displacement, which were divided into mini-cars, ordinary cars, intermediate cars and advanced cars.