Chinese President Xi Jinping, also general secretary of the Communist Party of China Central Committee and chairman of the Central Military Commission, visits the exhibition of the construction and development of the BeiDou Navigation Satellite System (BDS) after attending the completion and commissioning ceremony for the newly completed BDS-3 in Beijing, capital of China, July 31, 2020. Xi officially announced the commissioning of BDS-3 at the ceremony on Friday. [Photo/Xinhua]