Core Insights - The article highlights the significant improvement in the ecological health of the Shangtang River in Hangzhou, evidenced by a substantial increase in fish species and populations due to ongoing water quality monitoring and restoration efforts [3][5][7]. Group 1: Monitoring and Data Collection - Monitoring of aquatic ecosystems in Hangzhou began in 2008, initially focusing on the Tiesha River, with limited fish presence [3]. - In June, monitoring data revealed 21 fish species at two sampling points, a notable increase from 10 species in the same period of 2023 [5][6]. - The total weight of fish caught at these points reached 15.62 kilograms, nearly doubling from 5.30 kilograms in 2023, with the number of individual fish rising from 92 to 162 [6]. Group 2: Ecological Restoration - Key pollution indicators such as ammonia nitrogen and total phosphorus have decreased by over 50%, while dissolved oxygen levels have risen, creating a suitable environment for aquatic life [7]. - The introduction of ecological restoration techniques, including ecological slopes and artificial wetlands, has provided essential habitats for fish [7]. Group 3: Community Engagement - The article emphasizes the importance of community involvement in maintaining ecological balance, urging citizens to practice responsible fishing and release practices to protect local biodiversity [8]. - Hangzhou currently has 222 designated fishing areas, accessible through the "Zheli Ban" app for public awareness [8].