Photo taken on May 26, 2021 shows an unmanned detector displayed at an exhibition featuring satellite navigation achievements during the 12th China Satellite Navigation Conference (CSNC 2021) in Nanchang, capital of east China's Jiangxi Province. The 12th China Satellite Navigation Conference (CSNC 2021) kicked off here on Wednesday, highlighting the role of spatiotemporal data. The three-day conference focuses on the most recent technological and industrial application achievements of the BeiDou Navigation Satellite System (BDS) and development trends of global navigation satellite systems (GNSS). (Xinhua/Peng Zhaozhi)