A staff member exhibits an unmanned aerial vehicle equipped with the BeiDou Navigation Satellite System during the 12th China Satellite Navigation Conference (CSNC 2021) in Nanchang, capital of east China's Jiangxi Province, May 27, 2021. The three-day event, kicking off in Nanchang on Wednesday, 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. (Photo by Ma Yue/Guangming Picture)