This photo taken on October 30, 2017 shows powered parachutists practicing for the upcoming 2017 FAI World Fly-in Expo at Hannan airport in Wuhan in China's central Hubei province. China OUT / AFP / STR

This photo taken on October 30, 2017 shows powered parachutists practicing for the upcoming 2017 FAI World Fly-in Expo at Hannan airport in Wuhan in China's central Hubei province. China OUT / AFP / STR

This photo taken on October 30, 2017 shows powered parachutists practicing for the upcoming 2017 FAI World Fly-in Expo at Hannan airport in Wuhan in China's central Hubei province. China OUT / AFP / STR

This photo taken on October 30, 2017 shows powered parachutists practicing for the upcoming 2017 FAI World Fly-in Expo at Hannan airport in Wuhan in China's central Hubei province. China OUT / AFP / STR

This photo taken on October 30, 2017 shows a parachutist practicing for the upcoming 2017 FAI World Fly-in Expo at Hannan airport in Wuhan in China's central Hubei province. China OUT / AFP / STR

This photo taken on October 30, 2017 shows powered parachutists practicing for the upcoming 2017 FAI World Fly-in Expo at Hannan airport in Wuhan in China's central Hubei province. China OUT / AFP / STR