【正】 Chinese vehicle population sees a high-speed development, which increased by 20% annually in the past 10 years. And in larger cities, the growth rate is over 15% and volume of motor vehicles maintenance is 4.89 million, among which, the number of motorcycle is 2.514 million, with an annual increase of 24%. Most of these motorcycles are centralized in coastal cities. At the same time, China has more than 5,000 million bicycles.