Air traffic controllers, also known as "air traffic police", have to "see and listen to all directions" every day to provide air traffic services to aircraft. Civil Aviation Gansu Air Traffic Control Sub-Bureau is the largest air traffic control center (station) in China's airspace, with jurisdiction over eight provinces and regions.
Passenger throughput of Lanzhou Zhongchuan International Airport exceeded 1500 million for the first time in mid-April. "Air traffic police" are responsible for directing surface traffic, and we are directing three-dimensional traffic, Liu Dengwu said.