The Winter Games came to a celebratory close with the International Olympic Committee president hailing it an "unforgettable Olympic experience".
The 18-year-old American-born freestyle skier who represents China has become the first action-sports athlete to earn three medals at the same Winter Olympics.
China's home favourite, Eileen Gu, was roared on by fans in the final but she had to settle for silver.
Also at the Games, China's Eileen Gu got her maiden Olympics off to a dream start as the US-born teenager landed a tricky jump to become the freeski Big Air champion.
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