Chinese swimmer tests positive for banned substance in Rio

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China's flag bearer Lei Sheng leads his national delegation during the opening ceremony of the Rio 2016 Olympic Games at the Maracana stadium in Rio de Janeiro on August 5, 2016. (Franck Fife/AFP/Getty Images)

A Chinese swimmer has failed a drugs test at the Rio Olympics, according to China’s state-run news agency Xinhua, citing the China Swimming Association (CSA).

Chen Xinyi tested positive on August 7 for hydrochlorothiazide, a banned substance which acts as a diuretic.

Chen’s case is being considered by the Court of Arbitration for Sport (CAS) and the China Swimming Associated said it would respect its final decision, Xinhua said.

Chen Xinyi, 18, has already competed in the 100-meter butterfly event, placing fourth in the final held on Monday, according to the Rio Olympics official web site.

She is next scheduled compete in the 50-meter freestyle on Friday. .

Chen rose to fame at the National Games in 2013.

She won gold at the women’s 100-meter butterfly at the 2014 Asian Games in Incheon, and broke the world youth record in the category at the World Championship in Kazan last year.

Past doping scandals involving Chinese swimmers sparked controversy on Day 1 of the Rio Games.

Australian gold medalist Mack Horton inflamed the Chinese by calling his rival Sun Yang a drugs cheat. Sun served a three-month doping ban in 2014 but it was only made public after the event.

After beating Sun by a mere .16 of a second to win the 400m freestyle event on Saturday, Horton described his win as one “for the good guys.”

The Australian was bombarded with abuse on his social media accounts.

Chinese state media also piled in with a scathing article in the Global Times which described Australia as a country “at the fringes of civilization.” Australia’s chef de mission Kitty Chiller said there would be no apology for Horton’s remarks.

Sun went on to win the 200m freestyle, the only gold medal for swimming so far on China’s medal tally. At the end of Day 6, China had won 11 gold, 8 silver and 11 bronze.