An exhibitor shows a drone for forest fire alert and monitoring during the 12th China Satellite Navigation Expo (CSNE) in Nanchang, capital of east China's Jiangxi Province, May 27, 2021. Photo: Xinhua

Photo taken on May 27, 2021 shows an anti-jamming chip during the 12th China Satellite Navigation Expo (CSNE) in Nanchang, capital of east China's Jiangxi Province. Photo: Xinhua

Photo taken on May 27, 2021 shows an intelligent unmanned sanitation vehicle during the 12th China Satellite Navigation Expo (CSNE) in Nanchang, capital of east China's Jiangxi Province. Photo: Xinhua

An exhibitor shows a module with an anti-jamming chip during the 12th China Satellite Navigation Expo (CSNE) in Nanchang, capital of east China's Jiangxi Province, May 27, 2021. Photo: Xinhua