Bicycle is a kind of means of transportation which is convenient.You can take a short trip by riding a bicycle.In China,the places which most people work or study are not far away from their houses.So it is very convenient to riding bicycles.On the other hand,nearly every family can afford bicycles because the price of the bicycle is not high.And it may be main reason why most people are willing to ride bicycles.Finally,the most important is that we can save energy by riding bicycles.The population of China is about 1.3 billion and if every family have a car,it will cause great waste of energy.This will pollute the environment.To make our life better,let us use bicycles!