A row of public bicycles are pictured on Zhonghuan Road, Gangzha district, Nantong city, Dec 20. At present, a total of 16,500 public bicycles are available for hire around Nantong, with 10,000 of them recently added to the available stock. Without using cards, citizens can download an app and scan a QR code printed on each bike to rent one from 30 locations around Gangzha district. [Photo/ntgz.gov.cn]