The Sixth China (Mianyang) Science & Technology City International High-Tech Expo opens in the city of Mianyang, southwest China's Sichuan province, on Sept. 6, 2018. With the theme "Military-civilian integration, scientific and technological innovation and opening-up and cooperation," the four-day event has drawn over 650 exhibitors from 37 countries and regions. [Photo by Zheng Chengqiong/China SCIO]