20th China Overseas Scholar Innovation Summit kicks off in Dalian (1/4)

Visitors try virtual reality (VR) device during the 20th China Overseas Scholar Innovation Summit in Dalian, northeast China's Liaoning Province, July 5, 2019. The 20th China Overseas Scholar Innovation Summit kicked off here on Friday. (Xinhua/Lyu Wenzheng)

Visitors view robot products during the 20th China Overseas Scholar Innovation Summit in Dalian, northeast China's Liaoning Province, July 5, 2019. The 20th China Overseas Scholar Innovation Summit kicked off here on Friday. (Xinhua/Lyu Wenzheng)

Visitors experience football robots during the 20th China Overseas Scholar Innovation Summit in Dalian, northeast China's Liaoning Province, July 5, 2019. The 20th China Overseas Scholar Innovation Summit kicked off here on Friday. (Xinhua/Lyu Wenzheng)

An exhibitor introduces a model of solar-powered boat to visitors during the 20th China Overseas Scholar Innovation Summit in Dalian, northeast China's Liaoning Province, July 5, 2019. The 20th China Overseas Scholar Innovation Summit kicked off here on Friday. (Xinhua/Lyu Wenzheng)