Group 1 - The project department of China Railway 22nd Bureau Electric Company has established operations in Huangpu, focusing on urban transportation maintenance and low-altitude industry support, contributing to the development of the Greater Bay Area [1] - In the urban transportation sector, the project department is responsible for the maintenance of the Huangpu District's tram lines 1 and 2, implementing a "24-hour emergency response" model with capabilities for "5-minute response and 30-minute resolution" [1] - The project has submitted nearly 60 patents and academic papers, forming multiple practical technological achievements while exploring the application of cutting-edge technologies like "unmanned operation" in tram maintenance, enhancing both operational efficiency and intelligence [1] Group 2 - The project department is also involved in the construction of low-altitude new infrastructure and maintenance of low-altitude facilities in the Greater Bay Area, providing strong operational support for various activities [1] - In the future, the project department aims to deepen its involvement in the low-altitude sector and upgrade urban rail maintenance technology, offering integrated services of "low-altitude + urban rail" to empower the coordination of land and air in the Greater Bay Area [1]