An unmanned transplanter works in a rice paddy in a smart agriculture demonstration zone administered by Hongwei Farm Co., Ltd. of Beidahuang Group in northeast China's Heilongjiang Province, May 11, 2021. Equipped with a self-driving system based on the Beidou Navigation Satellite System (BDS), the smart transplanter can independently finish rice transplanting, avoid obstacles and turn around when needed. (Xinhua/Zhang Tao)