At present, solar cars have just come to the market and have not been popularized. Hybrid vehicles are mostly at the development stage, which still has a distance to replace the mainstream fuel cars. Unexpectedly, the concept of hybrid bicycle has come out. It can use solar energy, wind energy, gravitational potential energy, and of course, manpower. It can convert these energies into electric energy and store it in the rechargeable battery. Moreover, when riding uphill, it can automatically switch to the electric drive mode to reduce the work done by people when riding. Such kind of bicycles are more environmentally friendly, economical and labor-saving. I hope that they will become realistic products as early as possible.