As the development of the world, our country’s economy has become more and more better, people’s life standard has become much better, so people have money to amuse. Private car, once seemed to be untouchable for the ordinary people, now has been bought by most families. Owing private cars indeed brings people much convenience, but at the same time, it also has disadvantages. First, it needs to cost people a lot of money to keep the private cars. People need to buy a carport to stop the car, as it is known to all that buying a carport is very expensive, people also need to cost money to buy the gasoline. When the car is broken, it needs money to fix.