Olympian Huang Yu-ting could be punished after she posted a video on social media last month, showing her training in what appeared to be a Chinese suit.
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.
US Secretary of State Antony Blinken has brushed aside suggestions that Moscow would wait until after the Beijing Games, as commercial satellite images show fresh Russian military deployments.
Kamila Valieva, a 15-year-old figure skating star, tests positive for a banned heart medication before the Beijing Olympics Games, according to Russian media.
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.
The Olympics, overshadowed by diplomatic boycotts and concerns about Covid-19, will officially begin on Friday.
PM Scott Morrison invokes alleged human rights abuses by China, saying only Australian athletes will go to participate in the 2022 Winter Olympics to which Beijing responds: "whether they come or not, nobody cares".
Japan and Britain said they will discuss a diplomatic boycott against the 2022 Beijing Winter Olympics while Italy decided not to boycott the event.
US says it won't send government officials to the 2022 Winter Olympics due to China's human rights "atrocities," as Beijing pledges "countermeasures" against any diplomatic boycott.
Biden administration is expected to announce this week boycotting the 2022 Olympics due to the human rights records of China.
China's National Aquatics Centre will allow no more than 20 percent its capacity to attend the Winter Olympics events.
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