As the price of gas rises , the idea of buying an electric car strongly comes into in my mind again. 20 yuan for electricity once can keep driving for over 300 kilometres. The same ammount of money can only keep a gas powered car driving for 20 kilometres. In that case, I really want to ignore any disdavantages about electric cars. Maybe my phone have known my thoughts. In the past few days, some of the social apps in my phones served a lot of information about electric cars, even the clerk from a car store gave me a call and invited me to have a test drive. Another attractive thing is that if I buy an electric car, I can enjoy free of tax. Amazing! I even imagine that I am in an electric car and waiting for green light. When the light turns green, my car zooms ahead and leave others cars behind. The cool design of electric cars give their owner a feeling that they come from the future. But when I check my back account, everything suddenly keeps silent. So, I decide to go anywhere on foot instead.