Ecological and environmental protection is a comprehensive and comprehensive process that must be carried out vertically to the bottom and horizontally to the edge, forming a interconnected and coordinated institutional system. Strengthening the implementation of the system, making it a rigid constraint and an untouchable high-voltage line, can truly transform the institutional advantages in the ecological field into governance efficiency. Behind a successful environmental case, there is often a story about the system or legal system. Lu Xiaohua's home is located in Zhouying Village, Qiaolin Street, Pukou District, Nanjing City, Jiangsu Province, only a few hundred meters away from the Yangtze River. Going to the riverside to see the scenery during the day and dancing square dances at night has become her lifestyle habit. The vast river water and green flowers make her feel comfortable and comfortable. Looking back many years ago, Qiaolin Street was a different scene. On the 18.9 kilometer long riverbank line in Qiaolin Street, up to 47 shipyards of all sizes are gathered at most. Cutting, rolling, rust removal, and painting are not only production processes but also sources of pollution. Residents along the river complain: "The river is choking and we cannot open our eyes. We are 'not close to water, not close to water'." "We should jointly focus on major protection and not engage in major development." The concept has undergone a profound transformation, and the system has grown "teeth". Nanjing has formulated ecological protection red lines, environmental quality bottom lines, resource utilization online, and ecological environment access lists, comprehensively carried out special rectification actions on the Yangtze River shoreline, and formulated and implemented the "Nanjing Mayor's Jiang'an Line Protection Measures" and "Nanjing Mayor's Jiang'an Line Protection Regulations". Continuously weave a tightly woven network of systems to help shipyards transform into green spaces and docks into parks. Segments of "production shorelines" have become poetic and picturesque "ecological shorelines", vividly confirming that "protecting the ecological environment must rely on systems and the rule of law". Only when one's thinking and understanding are in place can one be conscious in action. Profound answers to the issue of the guarantee mechanism for ecological civilization construction. Without rules, there is no square. The institutional system with the nature of "four beams and eight pillars" of ecological civilization has basically formed. Today, the river chief system brings the river chief rule, with pictures of fish flying shallow on the bottom and people getting close to each other slowly spreading out; The increasingly improved wetland ecological compensation system enables the protection of habitats