An aircraft of Xiamen Airlines prepares to conduct a test flight at Beijing Daxing International Airport in Beijing, capital of China, May 13, 2019. Beijing Daxing International Airport completed its first test flight of passenger planes as four aircraft landed safely on the runway Monday morning. China Southern Airlines, China Eastern Airlines, Air China and Xiamen Airlines sent their flagship models A380, A350-900, B747-8 and B787-9, respectively, for the test. (Xinhua/Cai Yang)