This line is the first subway connecting Suzhou with Shanghai. With the theme of "meandering water and three cities moist", the design team extracted the characteristics from the "water town in the south of the Yangtze River" and applied winding lines to the space, from humanistic spirit to urban prosperity, from innovative development to the future of science and technology, running through the track of urban history and modern culture. At the same time, the modular BIM technology was used to integrate modernity and tradition to show the temperament and feelings of the city.