A robotic cleaner with 5G technology is seen during China-Central & Eastern European Countries (CEEC) Expo & International Consumer Goods Fair in Ningbo, east China's Zhejiang Province, June 8, 2019. With the theme of "deepening open cooperation, working together for mutual benefit and win-win", the first China-Central and Eastern European Countries Expo and International Consumer Goods Fair is held from June 8 to 12 in Ningbo. (Xinhua/Weng Xinyang)