China’s new multibillion-dollar airport completed its first test flights of passenger planes Monday ahead of its scheduled opening in September, according to domestic media reports.

Four airlines — Air China, China Eastern, China Southern, and XiamenAir — landed planes at Beijing Daxing International Airport between 9 a.m. and 10 a.m., the reports said. The upcoming opening of the $12 billion airport, located just over 40 kilometers south of the capital, aims to reduce the strain on Beijing Capital International Airport, the second-busiest airport in the world.

With four runways and passenger terminals covering over 700,000 square meters, the new megastructure is expected to serve 75 million passengers a year by 2025. China is projected to overtake the U.S. as the world’s largest aviation market by around 2022, according to the International Air Transport Association. (Video: Xinhua, re-edited by Sixth Tone)