Chinese President Xi Jinping, also general secretary of the Communist Party of China (CPC) Central Committee and chairman of the Central Military Commission, takes the subway heading for the Beijing Daxing International Airport on Sept. 25, 2019. The operation ceremony of the airport was held in Beijing on Wednesday morning. Xi attended the ceremony, announced the official opening of the airport and inspected the airport's platforms and check-in hall. [Photo/Xinhua]