Pull up the chain and put it on the front tooth plate, and keep it half-engaged. Hold this position with one hand and gently shake the pedal with the other. When the chain is completely stuck on the toothed plate, it is finished.

Bicycles, also known as bicycles or bicycles, are usually small land vehicles with two wheels. After people get on the bus, they are green and environmentally friendly vehicles powered by pedaling. British bicycles. Where bi stands for two, and cycle stands for wheels, that is, a two-wheeled vehicle.

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It can be used as an environmentally friendly means of transportation and tourism; More and more people use bicycles as fitness equipment for riding and cycling. Cycling itself is also a competitive sport, including road cycling, mountain cycling, track cycling and acrobatic cycling.