Core Points - Recent infrastructure developments in Jiangxi, Guizhou, and Sichuan provinces have significantly improved transportation and logistics in revolutionary areas, enhancing local tourism and economic growth [4][5][9] - The construction of key projects like Ruijin Airport, Huajiang Grand Canyon Bridge, and Jiajin Mountain Tunnel marks a historic breakthrough in the transportation network of these regions, facilitating better connectivity and attracting more visitors and investments [4][11][23] Group 1: Infrastructure Developments - Ruijin Airport officially opened on September 28, 2025, after a 90-year wait, providing a vital air link for the revolutionary area [7][23] - The Huajiang Grand Canyon Bridge, known as the world's highest bridge, has become a popular tourist destination, drastically reducing travel time across the canyon from 2 hours to just 2 minutes [9][11] - The Jiajin Mountain Tunnel has transformed travel in the region, allowing year-round access and significantly reducing travel time through previously difficult mountain routes [14][22] Group 2: Economic and Social Impact - The opening of Ruijin Airport has improved living conditions for local residents, with some benefiting from new housing and economic opportunities through local investments [23][25] - The Huajiang Grand Canyon Bridge has stimulated local businesses, such as hospitality, with increased tourist traffic leading to full bookings during peak seasons [25][26] - The Jiajin Mountain Tunnel has facilitated the development of tourism routes that connect historical sites and natural attractions, promoting local culture and heritage [26][28] Group 3: Technological and Engineering Innovations - Advanced construction techniques and technologies were employed in the development of these infrastructure projects, ensuring high-quality standards and efficiency [17][20][22] - The use of innovative methods, such as the "TBM + blasting method" for tunnel construction, has set new records in the industry [20][22] - Engineers have integrated smart technologies for monitoring and construction processes, enhancing safety and precision in challenging environments [20][22]