An ice maker maintains the track during the break of a game at the National Sliding Centre in Yanqing District, Beijing, capital of China, Feb. 9, 2022.Photo：Xinhua

Ice makers maintain the track at the National Sliding Centre in Yanqing District, Beijing, capital of China, Feb. 14, 2022.Photo：Xinhua

Ice maker Zhu Yongtao (1st R), together with his co-workers, maintains the track at the National Sliding Centre in Yanqing District, Beijing, capital of China, Feb. 15, 2022.Photo：Xinhua

An ice maker maintains the track at the National Sliding Centre in Yanqing District, Beijing, capital of China, Feb. 15, 2022.Photo：Xinhua