YouBike (Chinese: 微笑單車; pinyin: Wéixiào Dānchē), originally Taipei Bike Sharing System, is a public bicycle sharing service offered by the Taipei City Department of Transportation in a BOT collaboration with local manufacturer Giant Bicycles.

[4] Launched in 2009, the system initially saw an unexpectedly small number of daily users in the trial district of Xinyi.

This prompted the city's Department of Transportation [zh] to expand the system along the Taipei Metro lines and into several more districts.

[5] The slow initial adoption of YouBike rentals was overcome through adjusting the business model, such as by lowering rates (including making the first 30 minutes free of charge), and increasing ways to open an account (online via the YouBike website or at the kiosks).

[6][13] The cost of YouBike rental varies between areas in Taiwan, depending on whether the local government offers subsidies.