Qingju PRO is a new generation of shared bicycle, designed for short city trips. This bike is equipped with SHIMANO three-speed transmission to make the ride more comfortable, whether on a flat or hilly road. Through the use of composite materials to replace the traditional rubber and aluminum alloys, the weight of the bicycle is reduced to just 14 kg, making it the lightest shared bike on the market. The frame was designed using Aluminum 6061 to reduce weight while maintaining strength.