"It shows the truth that sticking to your dream will pay off one day," he added.

When Xie overtook huge favorite Su in 100m, everybody started to wonder whether he would be the next Chinese sprinter to bag double golds, and he made it with a record-breaking time of 20.20 seconds.

It was not a coincidence that Xie, skilled at 200m in his early years, won the 200m gold in the first Youth Olympic Games at age 17 in 2010.

His second gold at the National Games gave Xie a lot confidence in his ruling position in 200m, as he mainly ran in 100m and the relay for the past two years.

"The two golds have made me much firmer about the fact that there is something in common between the two events. What I am interested in is to find the win-win point," Xie said.

Xie, a member of the men's relay team, ran the second leg, as the Chinese men's relay team clocked 38.01 seconds to take a historical silver medal at the 2017 IAAF World Championships in Beijing.

Xie also made history when for the first time China entered the final of the Olympic men's 4x100m relay at the 2016 Olympic Games. The Chinese team finished in 37.90 seconds to take the fourth place, which was China's best of the relay event at the Olympics.

Also in men's 100m race at the Rio Games, Xie set a personal best time of 10.08 seconds in the qualifying phase, but failed to make the final. Zhang finished in 10.36 seconds, missing out on a spot in the semifinals.

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