Core Viewpoint - The 15th National Games, held in the Guangdong-Hong Kong-Macao Greater Bay Area, aimed to create a "carbon-neutral" event through systematic innovation practices, adhering to the principles of "green, shared, open, and clean" [1] Group 1: Utilization of Existing Facilities - The Guangzhou Tianhe Sports Center underwent low-carbon renovation, becoming the first near-zero carbon large sports venue in China, hosting various events [2] - Over 90% of venues in the Guangdong region were upgraded from existing facilities, avoiding new construction and associated carbon emissions [2] - The Hong Kong region utilized existing venues like the Kai Tak Sports Park and others to host multiple events, while Macau also leveraged local educational and recreational facilities [2] Group 2: Post-Event Utilization - The event's low-carbon practices extend beyond the event period, ensuring venues continue to serve urban development and public fitness, preventing resource wastage [3] - For instance, the Shenzhen Longhua Cultural and Sports Center will be open to the public post-event, and the Guangzhou University Town Sports Center will transform into a youth climbing base [3] Group 3: Technological Integration - Main venues and youth sports fields were equipped with rainwater collection systems and solar panels, contributing to sustainability [4] - The Guangdong Olympic Sports Center was modified to enhance natural ventilation and reduce heat gain, while the Macau Taishi Sports Center incorporated natural lighting and energy-saving systems to lower carbon emissions by 30% [4] - A cooling coating technology developed in Hong Kong was successfully applied in venues across Guangdong, showcasing collaborative innovation [5] Group 4: Comprehensive Support Services - Event uniforms and catering materials were made from environmentally friendly materials, and electronic processes were implemented to reduce paper usage [6] - Over 800 electric vehicles were deployed in the Guangzhou region, achieving a green travel rate of over 77% in urban areas, with similar initiatives in Hong Kong and Macau [6] Group 5: Public Engagement and Carbon Management - The Hong Kong government promoted public participation in low-carbon actions through guidelines and interactive exhibits during the event [7] - Shenzhen introduced a carbon emission accounting system for large events, with major companies donating 100,000 tons of carbon assets to offset emissions [7]