Core Viewpoint - The Ministry of Ecology and Environment has announced the inclusion of Dalian Bilui River Reservoir in the fourth batch of 47 exemplary beautiful rivers and lakes, highlighting its significance in the water ecological environment sector of Beautiful China [1] Group 1: Environmental Significance - Beautiful rivers and lakes serve as a concentrated embodiment and important carrier of Beautiful China in the water ecological environment field [1] - Dalian Bilui River Reservoir, located at the junction of Dalian Zhuanghe City, Pulandian District, and Yingkou Gai County, has a maximum capacity of 9.34 billion cubic meters and a shoreline of 245.2 kilometers in the first protection zone [1] Group 2: Water Quality and Biodiversity - The water quality of the reservoir has stabilized at Class II surface water standards, with the entire watershed maintaining good water quality [1] - Over the past three years, the eutrophication index has remained below 50, indicating a stable medium nutrient level [1] - The natural shoreline ratio within the protection area is 100%, and the biodiversity indicators for aquatic plants and animals are in excellent condition [1] Group 3: Wildlife Restoration - The reservoir has seen the return of the "king of freshwater fish," the fragrant fish, which had been absent for nearly 40 years [1] - The number of rare migratory birds, such as egrets, herons, and gray cranes, has been increasing annually, with swans also returning to nest [1]

Group 1 - The core viewpoint of the articles highlights significant improvements in China's surface water quality over the past decade, with the proportion of Class I-III water quality sections increasing from 64.5% in 2015 to 90.4% in 2024, marking a rise of 25.9 percentage points [1] - In 2024, the proportion of good surface water quality sections is expected to reach 90.4%, an increase of 1.0 percentage point year-on-year, achieving the "14th Five-Year Plan" target ahead of schedule [1] - The Yangtze River and Yellow River have maintained Class II water quality for five and three consecutive years, respectively, while Taihu Lake has reached its best water quality level since monitoring began [1] Group 2 - The Ministry of Ecology and Environment plans to expand its monitoring network to include more tributaries and small water bodies, reflecting the water conditions closer to the public [2] - The water ecological environment goals will shift from merely focusing on the proportion of Class III water quality to a more comprehensive "good water body proportion," incorporating ecological indicators alongside physical and chemical metrics [2]