Core Viewpoint - The transformation of ancient city moats in China reflects the evolution of urban functions from military defense to ecological corridors and cultural tourism, highlighting the importance of integrating historical heritage with modern urban life [1][9]. Group 1: Liaoyang City Moat - Liaoyang's moat, with a history of over 2300 years, has transitioned from a defensive barrier to an ecological corridor and cultural tourism link, showcasing significant changes in its function and appearance [1][3]. - The moat has undergone extensive renovation since 2004, including dredging, widening, and landscaping, resulting in a two-meter-wide pedestrian walkway and the creation of 13 pocket parks, enhancing the quality of life for residents [3][5]. - Historical sites such as Kui Xing Tower and Ping Hu Tower have been restored, integrating ancient history into modern urban life and improving the cultural quality of the city [5][7]. Group 2: Jinan Spring Moat - Jinan's moat, unique for being formed by spring water, connects several major springs and serves as a vital part of daily life for residents, reflecting the city's identity as "Spring City" [10][18]. - The moat is maintained by a dedicated team of cleaners and innovative environmental technologies, ensuring its cleanliness and vitality [16][18]. - The local government has implemented regulations to protect the springs and moat, reinforcing the connection between the natural environment and the community's lifestyle [18]. Group 3: Xiangyang City Moat - Xiangyang's moat, known for being the widest in Asia, has evolved from a military stronghold to a cultural and ecological symbol, embodying the city's historical and emotional significance for its residents [19][25]. - The moat faced pollution issues in the past, leading to multiple large-scale dredging and remediation projects, with ongoing efforts to maintain water quality and ecological health [21][23]. - The scenic integration of the moat with ancient city walls and vibrant urban life creates a unique atmosphere that is essential to the daily experiences of Xiangyang's inhabitants [25].