Peking University, February 12, 2022: During the Beijing 2022 Winter Olympics, the Ice Ribbon witnessed record-breaking speed skating races and incredible figure skating performances. The "greenest and fastest piece of ice in Olympic history" used the CO2 transcritical refrigeration system, ensuring a safe, efficient, and eco-friendly Olympics. Professor Zhang Xinrong of PKU College of Engineering, the innovative ice-making technology's developer, recently spoke with Tian Wei, a leading TV anchorwoman for foreign broadcasting at China Global Television Network (CGTN), about the technology’s development and mechanism. Please watch the video to learn more.