Robot Titan shows up during the Third World Intelligence Congress held in Tianjin, north China, May 16, 2019. The congress opened in northern China's Tianjin municipality on Thursday. (Xinhua/Yue Yuewei)

Guest addresses the main forum of the Third World Intelligence Congress held in Tianjin, north China, May 16, 2019. The congress opened in northern China's Tianjin municipality on Thursday. (Xinhua/Yue Yuewei)