Ma Yuhan (front) of Team China competes during the women's team persuit event at the ISU Four Continents Speed Skating Championships in Milwaukee, the United States, Feb. 2, 2020. (Photos: Xinhua)

Chen Xiangyu, Adake Ahena Er and Ma Yuhan (from L to R) of Team China react after the women's team persuit event at the ISU Four Continents Speed Skating Championships in Milwaukee, the United States, Feb. 2, 2020.

Wang Haotian, Yu Yang and Teenbuli Yeerken (from R to L) of Team China compete during the men's team persuit event at the ISU Four Continents Speed Skating Championships in Milwaukee, the United States, Feb. 2, 2020.

Kubo Koki of Japan competes during the men's 1000m race at the ISU Four Continents Speed Skating Championships in Milwaukee, the United States, Feb. 2, 2020.

Wang Chen of China competes during the men's 1000m race at the ISU Four Continents Speed Skating Championships in Milwaukee, the United States, Feb. 2, 2020.

Ma Yuhan, Chen Xiangyu and Adake Ahena Er (from L to R) of Team China compete during the women's team persuit event at the ISU Four Continents Speed Skating Championships in Milwaukee, the United States, Feb. 2, 2020.

Laurent Dubreuil of Canada competes during the men's 1000m race at the ISU Four Continents Speed Skating Championships in Milwaukee, the United States, Feb. 2, 2020.

Hayden Mayeur (front) of Team Canada competes during the men's team persuit event at the ISU Four Continents Speed Skating Championships in Milwaukee, the United States, Feb. 2, 2020.

Yu Yang (front) of Team China competes during the men's team persuit event at the ISU Four Continents Speed Skating Championships in Milwaukee, the United States, Feb. 2, 2020.

Brianna Bocox of the United States competes during the women's 1000m race at the ISU Four Continents Speed Skating Championships in Milwaukee, the United States, Feb. 2, 2020.

Mia Kilburg-Manganello (front) of Team U.S. competes during the women's team persuit event at the ISU Four Continents Speed Skating Championships in Milwaukee, the United States, Feb. 2, 2020.

Wang Haotian (front) of Team China competes during the men's team persuit event at the ISU Four Continents Speed Skating Championships in Milwaukee, the United States, Feb. 2, 2020.

Mia Kilburg-Manganello (r) of Team U.S. celebrates after the women's team persuit event at the ISU Four Continents Speed Skating Championships in Milwaukee, the United States, Feb. 2, 2020.

Vitaliy Schigolev (L) of Team Kazakhstan competes during the men's team persuit event at the ISU Four Continents Speed Skating Championships in Milwaukee, the United States, Feb. 2, 2020.

Yu Yang of China competes during the men's 1000m race at the ISU Four Continents Speed Skating Championships in Milwaukee, the United States, Feb. 2, 2020.