Core Viewpoint - The fourth Changsha International Engineering Machinery Exhibition highlights the importance of emergency equipment in disaster prevention, mitigation, rescue, and recovery, showcasing advanced technologies and innovations from leading companies in the sector [1][2]. Group 1: Event Overview - The exhibition features a focus on the entire chain of natural disaster prevention and emergency rescue, with numerous leading emergency equipment companies demonstrating their capabilities in high-end equipment development and smart technology applications [1]. - A total of 80 companies, including SANY Group, Zoomlion, Shanhe Intelligent, and China Railway Construction Heavy Industry, participated, showcasing innovative products that represent cutting-edge technology and development directions in the emergency equipment field [1]. Group 2: Technological Innovations - Shanhe Xinghang's tethered drone system can maintain a precision of 20 meters at a height of 200 meters to suppress fire effectively, while China Railway Construction Heavy Industry's large-diameter horizontal rescue drilling machine addresses engineering collapse issues by quickly creating escape routes [2]. - The Changsha Tianyi Research Institute displayed commercial SAR satellite models, such as "Hai Si No. 1" and "Chao Hu No. 1," which utilize synthetic aperture radar to monitor ground deformation with millimeter-level precision, regardless of weather conditions [2]. Group 3: Industry Development - The emergency equipment industry in Hunan has rapidly developed, leveraging the province's strengths in engineering machinery, aerospace, and electronic information, positioning itself as a national leader with two national safety emergency industry demonstration bases [4]. - SANY Group has filled industry gaps with products like fire trucks and chemical detection vehicles, while Zoomlion offers a diverse range of emergency equipment across six categories, including fire rescue and geological disaster rescue [4]. - Shanhe Intelligent has developed a series of specialized intelligent emergency rescue equipment, and companies like Huaxun Emergency Equipment and Diwo Technology have emerged as leaders in the domestic mobile emergency drainage equipment sector [4].