From above, the border line between Shanghai, Jiangsu, and Zhejiang provinces and cities meets at a point on the Taipu River, known as the "origin of the Yangtze River Delta". The "Fangting Water Institute" under construction is located on it, which is the finishing touch of the Yangtze River Delta Ecological Green Integration Development Demonstration Zone (hereinafter referred to as the "Demonstration Zone"). Why was this "Water Town Reception Hall" built? There are profound considerations involved. The geographical proximity and cultural affinity between Shanghai, Jiangsu, and Zhejiang have a good foundation in integrated development. However, due to the original fact that there were only highways, national roads, and provincial roads here, and the lack of a slow traffic system to support daily transportation, it has resulted in long-term congestion and congestion. Nowadays, this square hall water courtyard is like a button, connecting and connecting the border areas of two provinces and one city, showcasing the vibrant vitality of urban water symbiosis and regional sharing in the Yangtze River Delta region. Since its establishment in November 2019, the demonstration zone has adhered to the principles of green, low-carbon, and solid ecological foundation. Through joint protection and governance, it has broken down regional divisions and administrative barriers. Through modernization of the ecological environment governance system and governance capacity, innovation in cross-border governance systems, and other means, it has explored experiences and provided demonstrations for the Yangtze River Delta and other regions across the country. Co protection and joint governance, singing the "concerto" of ecological civilization. In the Yangtze River Delta region, drinking the same river water is closely related to safety and danger. Objectively speaking, traditional ecological governance methods often suffer from problems such as fragmentation and lack of coordination, which cannot adapt to the new problems and situations of collaborative governance. How to break the fragmented management model and achieve coordinated development across elements, departments, and fields? The region attempts to establish a seamless ecological protection red line and build an important ecological barrier for joint protection, forming a "five water co governance" pattern of water environment, water ecology, water resources, water security, and water culture. It continuously expands to the comprehensive prevention and control of air, water, soil and other pollution, achieving coordinated development of pollution reduction, carbon reduction, growth, and green expansion. In addition, we will explore breaking down the division of administrative zones and barriers, achieving coordinated protection and development of landscapes such as rivers, lakes, hills, and coastal areas, forming a joint protection and integrated control method for cross-border drinking water sources, improving the construction, operation, management, and sharing of ecological and environmental infrastructure, establishing a regional ecological environment quality and pollution source collaborative supervision system, and unified supervision and law enforcement methods. Institutional innovation and deep cultivation of ecological civilization experimental fields. The demonstration zone focuses on institutional innovation, pays attention to planning and land management, ecological protection, factor flow, financial and tax sharing, public services, and other aspects of work, explores an effective set of institutional arrangements, and provides guarantees for comprehensively deepening reforms. On the basis of practical exploration, the demonstration zone also pays attention to summarizing and establishing a mechanism for releasing institutional innovation achievements, which are publicly released to the society on a quarterly basis. On March 28, 2024, the Executive Committee of the Demonstration Zone released four institutional innovations and practical achievements, covering key and difficult issues such as ecological environment access, assessment of ecological environment quality, protection of cross-border drinking water source areas, and joint prevention and control of key cross-border water bodies, providing reference experience for other regions. The Yangtze River Delta region, with a land area of 4%, gathers about 17% of the country's total