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RIO DE JANEIRO, BRAZIL - AUGUST 06:  Xinyi Chen of China competes in heat four of the Women's 100m Butterfly on Day 1 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on on August 6, 2016 in Rio de Janeiro, Brazil.  (Photo by Lars Baron/Getty Images)
RIO DE JANEIRO, BRAZIL - AUGUST 06:  Xinyi Chen of China competes in heat four of the Women's 100m Butterfly on Day 1 of the Rio 2016 Olympic Games at the Olympic Aquatics Stadium on on August 6, 2016 in Rio de Janeiro, Brazil.  (Photo by Lars Baron/Getty Images)

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    Chinese swimmer fails doping test in Rio

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Chinese swimmer fails doping test in Rio

Chinese swimmer Chen Xinyi has tested positive for a banned substance at the Olympic Games in Rio, according to Xinhua, China's state-run news agency.

Chinese swimmer fails doping test in Rio

Chinese swimmer Chen Xinyi has tested positive for a banned substance at the Olympic Games in Rio, according to Xinhua, China's state-run news agency.