Group 1 - The Milan Winter Olympics is heavily influenced by the Beijing Winter Olympics, with organizers emphasizing the importance of Beijing's experience in areas such as sustainable development and venue transformation [3][4] - The majority of venues for the Milan Winter Olympics are either existing or temporarily modified, with 95% following a reversible transformation model similar to that of Beijing [3] - The introduction of carbon dioxide cross-critical direct cooling technology for ice rinks in Milan is expected to reduce energy consumption by 40%, showcasing the adoption of innovative techniques from Beijing [3] Group 2 - The Chinese delegation for the Milan Winter Olympics is the largest ever, with 126 athletes participating in 7 major events, reflecting China's efforts to expand and improve its winter sports program over the past four years [4] - The presence of Beijing Winter Olympic champions and a significant number of newcomers indicates a strategic shift from focusing on a few events to a broader participation across multiple disciplines [4] - The anticipation for stronger representation of Chinese athletes at the Milan Winter Olympics highlights the ongoing development and investment in winter sports in China [4]