Chinese badminton team head coach Li Yongbo (R) attends a training session at Esporte Clube Pinheiros in Sao Paulo, Brazil, July 30, 2016. Chinese athletes has arrived at Sao Paulo's Esporte Clube Pinheiros, the pre-games training center of the Chinese Olympic delegation for the upcoming Rio Olympic Games.Photo:Xinhua

Members of Chinese Synchronised Swimming team practise during a training session at Esporte Clube Pinheiros in Sao Paulo, Brazil, July 30, 2016. Chinese athletes has arrived at Sao Paulo's Esporte Clube Pinheiros, the pre-games training center of the Chinese Olympic delegation for the upcoming Rio Olympic Games. Photo:Xinhua

Chinese badminton athlete Yu Yang (R) practises during a training session at Esporte Clube Pinheiros in Sao Paulo, Brazil, July 30, 2016. Chinese athletes has arrived at Sao Paulo's Esporte Clube Pinheiros, the pre-games training center of the Chinese Olympic delegation for the upcoming Rio Olympic Games. Photo:Xinhua

Chinese badminton athlete Fu Haifeng practises during a training session at Esporte Clube Pinheiros in Sao Paulo, Brazil, July 30, 2016. Chinese athletes has arrived at Sao Paulo's Esporte Clube Pinheiros, the pre-games training center of the Chinese Olympic delegation for the upcoming Rio Olympic Games.Photo:Xinhua

Chinese badminton athlete Fu Haifeng practises during a training session at Esporte Clube Pinheiros in Sao Paulo, Brazil, July 30, 2016. Chinese athletes has arrived at Sao Paulo's Esporte Clube Pinheiros, the pre-games training center of the Chinese Olympic delegation for the upcoming Rio Olympic Games. Photo:Xinhua

Chinese fencing athletes Hao Jialu (L) and Sun Yujie practise during a training session at Esporte Clube Pinheiros in Sao Paulo, Brazil, July 30, 2016. Chinese athletes has arrived at Sao Paulo's Esporte Clube Pinheiros, the pre-games training center of the Chinese Olympic delegation for the upcoming Rio Olympic Games. Photo:Xinhua

Members of Chinese Synchronised Swimming team practise during a training session at Esporte Clube Pinheiros in Sao Paulo, Brazil, July 30, 2016. Chinese athletes has arrived at Sao Paulo's Esporte Clube Pinheiros, the pre-games training center of the Chinese Olympic delegation for the upcoming Rio Olympic Games.Photo:Xinhua