Group 1 - The "Two Major" projects are driving the acceleration of significant engineering projects across multiple regions, supported by macro policies aimed at expanding effective investment [2][3] - The Beijing Urban Sub-center Station, part of the "Two Major" projects, is progressing to the decoration phase and is expected to be completed by the end of 2025, enhancing connectivity to major airports and regions [2] - As of early April, the "Two Major" projects supported by ultra-long-term special bonds have attracted approximately 2.1 trillion yuan in social capital investment [3] Group 2 - In the first quarter, national investment exceeded expectations, with a strong growth momentum expected to continue in the first four months of the year [4] - The State Council approved new nuclear power projects, involving significant participation from private enterprises, with ownership stakes exceeding 10% [4]

Core Points - The main tower of the key project, the Shenchang Railway's main bridge across the Modao River, has been capped on May 11 [2][3][5] - The bridge is a 140-meter high cable-stayed bridge that spans the Modao River, located at the boundary between Zhongshan and Jiangmen cities [3][5][10] - The Shenchang Railway is an important part of China's "Eight Vertical and Eight Horizontal" high-speed rail network along the coastal corridor, with a total length of 116 kilometers starting from the Shenzhen Xili Station [3][10][12] - Upon completion, the railway will enable a one-hour travel time between Shenzhen and Jiangmen, connecting five cities: Shenzhen, Dongguan, Guangzhou, Zhongshan, and Jiangmen [5][10][12]

Core Points - The main tower of the Shencheng Railway's bridge over the Modao River has been capped, with the second tower expected to be capped by the end of June 2023, laying the groundwork for the line's completion by 2028 [1][4] - The Shencheng Railway spans 116 kilometers, connecting five cities in the Guangdong-Hong Kong-Macao Greater Bay Area, serving as a major intercity corridor in the Pearl River Delta [1][6] Project Details - The project, undertaken by China Railway Construction Bridge Bureau, has a total length of 23.72 kilometers, with the bridge comprising 100% of the project [2] - The main bridge measures 689.8 meters in length, with a main span of 320 meters, and is designed to cross a Class I navigation channel at a height of 140 meters [2] Construction Challenges - The construction of the main tower faced significant challenges, including high navigation standards, fast water flow, and limited working space, with a focus on high-altitude work risk management and temperature control for large concrete volumes [4][6] - The project implemented a "three-dimensional safety protection network" and utilized a fully enclosed intelligent tower construction system to enhance precision and stability, reducing high-altitude work risks by 50% [4][6] Technological Innovations - The project employed digital twin technology to simulate construction processes, optimizing construction plans and using intelligent monitoring systems to track stress, deformation, environmental parameters, and equipment status in real-time [4] - The maximum single concrete pouring volume reached 518 cubic meters, with temperature sensors installed to monitor temperature changes during the pouring process, effectively preventing cracks due to temperature stress [6] Economic Impact - The Shencheng Railway is a key project in the Greater Bay Area's "half-hour economic circle," enabling travel from Jiangmen to Shenzhen in under one hour and connecting with the Guangzhou-Shenzhen-Hong Kong Express Rail Link, which is crucial for developing a "railway-based Greater Bay Area" [6]

Group 1 - The Guangzhan High-Speed Railway is set to open within the year, reducing travel time from Guangzhou to Zhanjiang to 1.5 hours, enhancing connectivity in the Guangdong-Hong Kong-Macao Greater Bay Area [1][2] - The Guangzhan High-Speed Railway spans approximately 400 kilometers and will facilitate a direct link between major cities, promoting integrated development in the region [2] - The construction of the main station building at Foshan Station has been completed, laying a solid foundation for the railway's operational requirements [2] Group 2 - The Shenjiang Railway, a key intercity corridor in the Pearl River Delta, has completed the pile foundation construction for the first station, Henglan Station, marking significant progress in the project [3] - The Shenjiang Railway will connect Shenzhen to Jiangmen, covering a total length of 116.12 kilometers and featuring seven stations, significantly improving travel times within the region [3] - Upon completion, the Shenjiang Railway will enhance coastal connectivity and integrate with the Guangzhou-Shenzhen-Hong Kong High-Speed Railway, further promoting the Greater Bay Area's development [3] Group 3 - The construction of the Deep-Shan Station, a major railway hub connecting the Greater Bay Area to the eastern Guangdong region, has entered the above-ground structural phase [4][5] - Deep-Shan Station will serve as a strategic node for the Greater Bay Area, facilitating a "Shenzhen half-hour" and "Guangzhou 40 minutes" travel circle [5] - The station's construction is crucial for improving transportation capacity in the Deep-Shan Special Cooperation Zone and enhancing communication between the Greater Bay Area and eastern Guangdong [5]