Bicycles can be used as an environmentally friendly means of transportation for walking and traveling; More and more people use bicycles as fitness equipment to exercise and travel by bike; Cycling itself is also a competitive sport, including road cycling, mountain cycling, field cycling, stunt cycling, etc.

Bicycles, also known as bicycles or bicycles, are usually small land vehicles with two wheels. After riding the car, it is a green and environmentally friendly vehicle driven by stepping on the pedal. In Mainland China, Taiwan and Singapore, they are often referred to as "bicycles" or "bicycles"; In Hong Kong and Macao, it is usually called "bicycle" (in fact, it is usually called in Cantonese); In Japan, it is called "self transfer". There are many kinds of bicycles, including single-person bicycles, double-person bicycles and multi-person bicycles.