The bike-sharing phenomenon allows users to leave their bikes anywhere. The bikes pictured belong to Ofo - one of the firms that is growing fast. A Chinese bike-sharing company has gone out of business after 90% of its bikes went missing in the first five months.
![Chinese bike share firm goes bust after losing 90% of bikes](https://cdn-ak-scissors.b.st-hatena.com/image/square/eaa186d8287a97d5baefdfaa224bc6feb6c12d63/height=288;version=1;width=512/https%3A%2F%2Fichef.bbci.co.uk%2Fnews%2F1024%2Fbranded_news%2F2C3F%2Fproduction%2F_96572311_reutersofobikes.jpg)