In pics: unattended book shop in east China's Shandong

A resident pays for books by scanning a QR code at an unattended book shop in Dongsheng community of Zaozhuang City, east China's Shandong Province, Dec. 27, 2017. The unattended book shop, first of this kind in Zaozhuang, was opened in June 2017. People can read for free and pay for books by scanning QR code. (Xinhua/Sun Zhongzhe)