The construction difficulty of Beijing Daxing International Airport is rare in the world. Its terminal building is the largest isolation building in the world, and it has also built the largest single concrete slab in the world. Beijing Daxing International Airport has created more than 40 international and domestic firsts, with 103 technical patents and 65 new construction methods, and the localization rate is over 98%. Thousands of construction units, more than 50,000 people worked at the same time during the peak period of construction, and maintained "safe production and zero accidents" throughout the process, fully achieving the goal of clean engineering.