杭州市拥有世界上最大的公用自行车系统(bike sharingsystem)。目前杭州市共有2700个公用自行车租赁站点，共计66500辆车。计划至2020年，公共自行车的数量将增至175000辆。租用自行车需要智能卡(smart card)，可在任意站点租车、在任意站点还车。租车骑行1小时内免费，1小时以上则按每小时1元收费。公用自行车系统对缓解杭州市的交通通撞(congestion)起到了很大的作用。

　　With 66,500 bikes in 2,700 renting stations in thecity now, Hangzhou owns the largest bike sharingsystem in the world. It plans to increase to 175,000 bikes by 2020. For renting a bike, one needs asmart card. One can rent a bike and return it at anystation. Bike users can ride for free for the first hourand pay RMB 1 yuan per hour for the extra time. The system is of great help to relieve thetraffic congestion in Hangzhou city.

（编辑：赵宁）