Group 1 - The "Huanbei Guangxi Project" has achieved a significant milestone with the successful launch of the "Huanbei Guangxi No. 7 TBM" in the Liuwanda Mountain tunnel, with two other TBMs expected to start by August, enhancing project efficiency [1] - The Liuwanda Mountain tunnel, which is 25 kilometers long and has complex geological conditions, will see the TBM undertake 11.427 kilometers of tunneling, advancing over 500 meters per month [1] - The project is a key component of the national water network and aims to improve water supply security for major cities in Guangxi, benefiting nearly 14 million people upon completion [1] Group 2 - The Huanbei Guangxi Project is equipped with a total of 7 TBMs, with 3 expected to start this year, creating a multi-point construction strategy that significantly enhances excavation efficiency [2] - The simultaneous operation of the 3 TBMs establishes a solid foundation for subsequent tunneling work [2]

Core Viewpoint - The Lingdong Reservoir, also known as Dong Lake, plays a crucial role in water resource management, irrigation, and ecological protection for the local population and agriculture in Lingshan County, despite facing challenges such as drought and water level fluctuations [2][3][6]. Group 1: Reservoir Management and Operations - The Lingdong Reservoir has a total dam length of 1,824 meters and a total capacity of 169 million cubic meters, with an effective capacity of 79 million cubic meters [2]. - The reservoir is currently under strict management to protect water sources, prohibiting feeding fish and fishing without approval, ensuring sustainable aquatic life [2]. - Despite recent drought conditions leading to the lowest water level in 60 years, the reservoir continues to supply between 100,000 to 500,000 cubic meters of water daily for irrigation, flood control, and drinking water for over 500,000 residents and 180,000 acres of farmland [2]. Group 2: Historical Significance and Development - The Lingdong Reservoir has been a vital resource for the local community for over 60 years, addressing historical issues of flooding and drought that have affected the region [3][5]. - The construction of the reservoir began in 1958, following significant government support, and was completed after five years of hard work by local residents, marking a significant achievement in water management [5]. - The reservoir has since contributed to local economic development, particularly in aquaculture, with the local fish seedling industry producing over 10 billion fry annually and generating an annual output value of 300 million yuan [6]. Group 3: Future Prospects and Regional Impact - The Lingdong Reservoir is an integral part of the Beibu Gulf water resource allocation project, which aims to provide reliable water supply for nearly 14 million people in regions including Nanning, Qinzhou, Beihai, and Yulin [6]. - The reservoir is expected to continue playing a significant role in regional development and ecological protection, enhancing water resource management in conjunction with other infrastructure projects [6].