Combined photo shows MOZI 2 solar-powered unmanned aircraft flying in the sky (upper photo) and staff members posing with the aircraft on July 27, 2019. After two years of research and development, the "MOZI 2" solar-powered unmanned aircraft, with independent intellectual property rights, successfully made its maiden flight at Moganshan airport in Deqing, east China's Zhejiang Province on July 27, according to its producer OXAI Aircraft Co., Ltd. on Tuesday. (Oxai Aircraft/Handout via Xinhua)