A visitor takes a picture with his mobile phone at the terminal hall of the new Daxing airport, which is under construction on the outskirts of Beijing, on Monday. The 80-billion-yuan (US$11.8 billion) airport is poised to become one of the world’s largest when it opens in October 2019. Made up of 1.6 million cubic meters of concrete and 52,000 tons of steel, the airport spans a total 47 sq km, including runways. It is expected to serve an initial 45 million passengers a year with an eventual capacity of 100 million, putting it on par with Hartsfield-Jackson Atlanta International Airport.SD-Agencies