Cashier-free supermarket run in N China's Tianjin

A customer scans a QR code before shopping at the JD-running X-mart, a cashier-free supermarket, in north China's Tianjin, June 29, 2018. Operated by China's e-commerce giant JD.com, such supermarkets use technologies including the Internet of Things (IOT), artificial intelligence (AI) and biometrics to create an unmanned shopping experience. [Photo: Xinhua]