Core Viewpoint - The Dali Bai Autonomous Prefecture in Yunnan Province has been actively engaged in the protection and sustainable development of Erhai Lake, leading to gradual improvements in water quality, environment, and ecology through systematic efforts and scientific evaluation methods like the "Erhai Index" [1][2][3] Group 1: Erhai Index and Ecological Protection - The "Erhai Index" evaluates ecological protection through four dimensions: cleanliness, clarity, ecology, and sharing, with eight assessment indicators [2][3] - The index allows for a comprehensive evaluation of Erhai's ecological protection efforts and serves as a guide for future decision-making [3] - The index reflects the effectiveness of ecological restoration efforts, such as the recovery of aquatic vegetation and fish populations [2][3] Group 2: Smart Monitoring and Data Utilization - Dali has established a "smart network" for monitoring water quality, with 428 automatic monitoring stations providing real-time data [5] - The "Digital Erhai" platform integrates data from various departments, enabling effective monitoring and rapid response to pollution incidents [5][6] - Continuous investment in ecological protection has led to significant infrastructure improvements, including wastewater treatment facilities and ecological corridors [6] Group 3: Economic and Social Benefits - The ecological protection of Erhai has resulted in increased tourism, with Dali receiving 98.21 million visitors and generating 120.8 billion yuan in tourism revenue in the first three quarters of the year [7][8] - The establishment of an ecological compensation mechanism has facilitated financial rewards for maintaining water quality, benefiting both upstream and downstream communities [8] - Local communities have embraced tourism and ecological preservation, leading to a significant increase in local businesses and sustainable practices [8]