Chinese short track speed skaters take part in a training session before the 2019-2020 ISU Short Track World Cup in Dordrecht, the Netherlands, Feb. 13, 2020. (Photos: Xinhua)

Ren Ziwei (3rd L) and Zang Yize (2nd L) of China take part in a training session before the 2019-2020 ISU Short Track World Cup in Dordrecht, the Netherlands, Feb. 13, 2020.

Zhang Chutong of China takes part in a training session before the 2019-2020 ISU Short Track World Cup in Dordrecht, the Netherlands, Feb. 13, 2020.

Chinese short track speed skaters take part in a training session before the 2019-2020 ISU Short Track World Cup in Dordrecht, the Netherlands, Feb. 13, 2020.

Ren Ziwei (C) and Zang Yize (R) of China take part in a training session before the 2019-2020 ISU Short Track World Cup in Dordrecht, the Netherlands, Feb. 13, 2020.

Qu Chunyu of China (L) takes part in a training session before the 2019-2020 ISU Short Track World Cup in Dordrecht, the Netherlands, Feb. 13, 2020.

Fan Kexin of China takes part in a training session before the 2019-2020 ISU Short Track World Cup in Dordrecht, the Netherlands, Feb. 13, 2020.

Chinese short track speed skaters take part in a training session before the 2019-2020 ISU Short Track World Cup in Dordrecht, the Netherlands, Feb. 13, 2020.

Han Tianyu (L) and An Kai of China take part in a training session before the 2019-2020 ISU Short Track World Cup in Dordrecht, the Netherlands, Feb. 13, 2020.

Kim Sun-tae (3rd R), coach of Chinese short track speed skating team, and skaters take part in a training session before the 2019-2020 ISU Short Track World Cup in Dordrecht, the Netherlands, Feb. 13, 2020.

Qu Chunyu of China takes part in a training session before the 2019-2020 ISU Short Track World Cup in Dordrecht, the Netherlands, Feb. 13, 2020.