Combo photo shows a staff member demonstrating playing table tennis with an Omron robot at the first China International Import Expo (CIIE) in Shanghai, east China, Nov. 5, 2018 (top), and a visitor playing table tennis with an Omron robot during the second CIIE, Nov. 7, 2019 (bottom). Many enterprises which attended the first CIIE last year returned this year, hoping to expand global market via the expo. (Xinhua/Fang Zhe)