Learning Objective： Shared bicycles provide bicycle sharing services on campuses, subway stations, and public service areas. Shared bicycles are provided by companies. Users first need to register with their mobile phones or computers using their real-name, and then pay the required deposit. Then they can use the bicycle freely according to the specified charging standards, and finally pay the fees online automatically. The emergence of shared bicycles not only solves people's short-distance travel, but also benefits environmental protection and people's health. At present, China's bicycle sharing is developing very rapidly, and more than 20 brands such as "Mobike" and "ofo" have emerged.