Athletes compete during the men's 500m of speed skating event at the 3rd Winter Youth Olympic Games on Lake St. Moritz, Switzerland, Jan. 12, 2020. (Photos: Xinhua)

Sun Jiazhao (1st L) of China competes during the men's 500m of speed skating event at the 3rd Winter Youth Olympic Games on Lake St. Moritz, Switzerland, Jan. 12, 2020.

Photo taken on Jan. 12, 2020 shows the St. Moritz Lake, venue for speed skating at the 3rd Winter Youth Olympic Games, in St. Moritz, Switzerland.

Yamamoto Yudai of Japan competes during the men's 500m of speed skating event at the 3rd Winter Youth Olympic Games on Lake St. Moritz, Switzerland, Jan. 12, 2020.

Silver medalist Nil Llop Izquierdo of Spain, gold medalist Yamamoto Yudai of Japan and bronze medalist Xue Zhiwen of China (from L to R) attend the mascot ceremony for men's 500m of speed skating event at the 3rd Winter Youth Olympic Games on Lake St. Moritz, Switzerland, Jan. 12, 2020.