While five for-profit shared bike companies debuted their services in Xiamen last December, a pair of new companies recently debuted free ad-sponsored shared bike services that require no deposit and no ridership fees. 
 
Renmin Bike is offering free bike share services around the Software Park and Guanyinshan while Jiujiu Bike is offering free citywide services. The number of shared bikes in Xiamen peaked at an estimated 250,000 bikes, with 80 percent on the island of Xiamen, according to bike company figures.
Source:http://www.xmenglish.cn/DynamicInformation/201709/t20170921_5114397.htm