A ferris wheel is a kind of mechanical wheel for passengers to ride on the edge of the building. Passengers sit on the ferris wheel and turn up slowly, overlooking the surrounding scenery from a high place. The most common Ferris wheel generally appears in amusement parks (or theme parks) and park fairs. The ferris wheel is an amusement park ride consisting of a large vertical wheel with places for people to sit or stand spaced evenly around the outer circumference. In operation, the ferris wheel revolves about a horizontal axis, and the riders are alternately lifted and then lowered as they are carried around the wheel in a circle. When the wheel stops, the people in the seat or platform at ground level exit the ride, and new riders take their place. The wheel then revolves a short distance until the next seat or platform is at ground level, allowing more people to exit and enter. This procedure is repeated until all the seats or platforms are filled with new riders, at which time the wheel is set in motion to undergo several complete revolutions.As a kind of amusement park motor game, it is called "three treasures of paradise" together with roller coaster and carousel. However, Ferris wheel often exists alone in other occasions and is usually used as an observation platform for activities.At the same time, Ferris Wheel will also become a symbol of an amusement park and even the city.