Group 1: Transformation and Utilization of the Expo Venue - The Expo venue has transitioned from a temporary event to a year-round attraction, showcasing a unique path for post-event utilization in Yanqing District [4][5] - The China Pavilion has been upgraded to an ecological civilization display platform, while the International Pavilion has transformed into a multifunctional venue hosting sports events and exhibitions [4] - Visitor engagement has increased significantly, with average stay duration extending from 3 hours to 2.5 days, and overnight stay rates reaching 45% [5] Group 2: Ecological and Environmental Initiatives - Yanqing District has prioritized ecological indicators, achieving an air quality improvement with 308 days of good air quality projected for 2024, the only district in Beijing to exceed 300 days [2] - The district has implemented comprehensive water resource management, ensuring 100% safety rates for drinking water sources and stable water quality across seven assessment points [2] - The area boasts a biodiversity richness, with 100 species of nationally protected wildlife and 12 species of protected plants, making it one of the most biodiverse districts in Beijing [3] Group 3: Cultural and Tourism Development - The upcoming China Great Wall Museum is set to open next year, enhancing the cultural significance of the Great Wall, which spans 179.2 kilometers in the district [6][7] - Yanqing District aims to develop a world-class Great Wall scenic area, integrating various historical sites and promoting cultural tourism [7] - The district is projected to receive 24.55 million tourists in 2024, with a total tourism expenditure of 13.5 billion yuan, reflecting a growth of 21.1% and 10.8% respectively [8]