When you travel by air, you often see pilots in uniform rushing into and out of airport terminals. But becoming a pilot is costly and involves a lot of training. In China, 90 percent of the country’s airline pilots are trained at the same school. It’s the world’s largest civil aviation institution — the Civil Aviation Flight University of China. After graduation, pilots must first become familiar with Airbus and Boeing planes before they can work as copilots. If they want to become captains, it takes longer. For example, for Air China, a pilot needs to have had more than 3,000 hours of flight time to fly a Boeing 737. For a Boeing 767 it’s 4,000 hours. After four years of school, a pilot needs at least five years of flying, during which period there is more training, strict assessment and a brutal elimination process.