There is a saying that the world will run out of oil in 40 years. That's why the Shanghai Auto General Pavilion has a new IDEA -- a small car that uses electricity as its energy source. This car can be driven by yourself, or you can set it to automatic (the car has a computerized networking system in it, which will always update the road conditions. And it can drive itself). The future could be that on the side of the road, when the car runs out of power, it goes to a power station to recharge (in the same nature as cars go to gas stations to refuel now) ......