"My son is very brave. Normal kids will be scared to do it after two failures," Wang Yukun says, adding that success in the sport "depends on one's courage and psychological quality."

On the third attempt, Wang Ke succeeded and flew 19 meters, on a domestic 110cc motorcycle (motorcycle with 110 cubic centimeters displacement). His father applied to The Guinness World Records, hoping to get his son certified as the youngest motorcyclist jumping the longest span.

Wang Ke has often hurt himself in training. "My biggest difficulty," he says, "is that I dare not do stunts when I'm in the sky, as it's too hard."

Last July, he ran into steel wires when joy-riding at high speed in the Inner Mongolia autonomous region without his usual protective gear. He got stitches under his nose and inside his mouth, and was hospitalized for a week.

From then on, he began to wear his helmet, goggles and body protection all the time for motorcycling, not just when he's training.

He has to practice motorcycling on weekends, about two to three hours each day. He does physical exercise for half an hour every day to build his body.

He's also fond of various other sports, such as billiards, football and basketball. He joined the provincial competition in roller-skating for teenagers at the age of 8, and won the championship three years in a row.