Today I would like to show you something about the cycling sport.Let's start from the origin of the bicycle and its development.In 1790, a man called 西夫拉克 came up with a design that is considered to be the prototype of the bicycle.Here it is.(As you see,) it would not move unless we stamped against the ground with our feet.In the 1874, one British called 罗松 devised the first bicycle operated by riding on it, which made it a practical means of transport.But its front wheel was too big to keep balance.Now bicycles have developed a variety of specialized types.Here we will see six common variations.1.2.3.4.5.6.Cycling is a sport popular in a world wide scale.There are bicycle fans in all ages and from erevy corner of the world.This is the school bicycle community.It has more than 200 members.We took riding exercises every week except for bad weathers.Join us whenever you want.