An automatic cleaning robot is at work during the Light of Internet Expo of the fifth World Internet Conference in Wuzhen Township of Tongxiang, east China's Zhejiang Province, Nov. 6, 2018. Opening here on Tuesday, the exposition focuses on the world's most recent internet development trends and cutting-edge technologies, showing the latest internet technologies, achievements, products and applications of more than 430 enterprises and institutions from home and abroad. (Xinhua/Xu Yu)