Core Insights - The construction of major engineering projects continues during the "May Day" holiday, with significant progress being made in various regions [1] Group 1: Jiangsu - Haitai Yangtze River Tunnel - The Haitai Yangtze River Tunnel, spanning 11.185 kilometers, is the longest underwater road tunnel in the world, currently progressing with a shield tunneling machine named "Jianghai" [1][2] - As of now, the "Jianghai" shield machine has advanced 200 meters at a rate of 10 meters per day, utilizing advanced technology for efficient operation [1][2] - The tunnel features a unique rescue vehicle passage for emergency situations, designed to enhance safety and efficiency, with an expected completion date in 2028 [2] Group 2: Jiangxi - Changjiang Navigation Channel Improvement Project - The Changjiang Navigation Channel improvement project in Jiangxi is actively progressing, with over a hundred workers on-site during the holiday [3] - The project, which started in October 2024 and is expected to be completed by the end of 2028, aims to enhance the annual cargo throughput capacity to 15 million tons [3][4] - Innovative management and technology have led to significant cost savings of over 100 million yuan and a three-month reduction in the project timeline [4][5] Group 3: Safety and Technological Innovations - The Changjiang Navigation Channel project employs advanced monitoring systems, including 22 4K cameras, to ensure safety and effective risk management [4][5] - The integration of smart management and technological innovations is transforming construction practices, enhancing efficiency and safety [5]