RIO DE JANEIRO, BRAZIL - AUGUST 12: Zhen Wang of China competes in the Men's 20km Race Walk on Day 7 of the Rio 2016 Olympic Games at Pontal on August 12, 2016 in Rio de Janeiro, Brazil. (Photo by Ryan Pierse/Getty Images)
RIO DE JANEIRO, BRAZIL - AUGUST 12: Zhen Wang of China crosses the finish line to win gold in the Men's 20km Race Walk on Day 7 of the Rio 2016 Olympic Games at Pontal on August 12, 2016 in Rio de Janeiro, Brazil. (Photo by Ryan Pierse/Getty Images)
RIO DE JANEIRO, BRAZIL - AUGUST 12: Silver medalist Zelin Cai of China and gold medalist Zhen Wang of China celebrate after the Men's 20km Race Walk on Day 7 of the Rio 2016 Olympic Games at Pontal on August 12, 2016 in Rio de Janeiro, Brazil. (Photo by Ryan Pierse/Getty Images)
RIO DE JANEIRO, BRAZIL - AUGUST 12: (L-R) Silver medalist Zelin Cai of China, gold medalist Zhen Wang of China and bronze medalist Dane Bird-Smith of Australia celebrate after the Men's 20km Race Walk on Day 7 of the Rio 2016 Olympic Games at Pontal on August 12, 2016 in Rio de Janeiro, Brazil. (Photo by Ryan Pierse/Getty Images)
RIO DE JANEIRO, BRAZIL - AUGUST 12: Zhen Wang of China poses with the gold medal for Men's 20km Race Walk on Day 7 of the Rio 2016 Olympic Games at the Olympic Stadium on August 12, 2016 in Rio de Janeiro, Brazil. (Photo by Jamie Squire/Getty Images)
