Bicycle, also known as bicycle or bicycle, is usually the two round of small land vehicles. People riding on the bus, with the foot pedal as a driving force, is the green traffic tools. English bicycle. Where Bi means two, and the cycle means that the wheel, that is, two wheels. In mainland China, Taiwan and Singapore, which are usually called "bike" or "bike"; in Hong Kong and Macao is usually referred to the "bicycle" (in fact, Cantonese usually are so called); and in Japan called self orthogonally (RPM) car. There are many kinds of bicycles, there are single, double, and many others.