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.