1) global car ownership more than 1 billion, and growing at more than 5% of the rate of growth;

2) China's car ownership is a breakthrough 150 million, and to maintain an annual growth rate of nearly 10.5%;

3) Since 2013, began a large-scale recovery vehicle exhaust nationwide mandatory testing, more than 12% of car emissions of non-compliance;

4) With the increasing world energy shortage and high gasoline prices, it has exceeded 7.7 yuan / liter, oil life has been less than 100 years;

5) motor vehicle exhaust is the major source of PM2.5 in the air, vehicle exhaust emissions in a distance of 0.5 meters from the ground (that is, people's breathing zone range), it is closely related to human health. It is reported that a car pollutant emissions a year three times larger than its own weight.

6) car every three months or with 5000km will be maintained in order to maintain a good vehicle performance.

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