The National Speed Skating Oval will host the speed skating competitions during the Beijing 2022 Olympic and Paralympic Winter Games. People would love to address it as "The Ice Ribbon", the shape of which resembles the skating trails of fast-speed skaters. The skating hall of the Oval has an ice surface of about 12,000 square meters, making it the largest speed skating stadium in Asia. The Oval is the world's first Winter Olympic venue using carbon dioxide transcritical direct cooling ice-making technology. The temperature difference on the ice surface does not exceed 0.5 degrees centigrade, which is beneficial for athletes to log good results.