Group 1 - The core point of the news is the successful completion of the dam closure and water storage for the Maiwan Water Conservancy Project, marking a significant transition from construction to operational phase [1][2] - The water storage plan aims to reach a reservoir water level of 101 meters, with a corresponding storage capacity of 282 million cubic meters, which will enhance water supply and irrigation conditions in the region [1] - The project is expected to improve flood control standards in Haikou from a 50-year to a 100-year frequency, significantly increasing the region's flood disaster reduction capabilities [1] Group 2 - The Maiwan Project is part of the national key water-saving supply projects and is a significant component of Hainan's water network construction plan, initiated on April 13, 2020 [2] - The project incorporates ecological and environmental protection measures, including the installation of fish ladders to facilitate fish migration and the establishment of fish breeding stations to minimize the impact on aquatic life [2]