FCHA collaborates with Vanke Urban Research Institute to plan, design and implement the system, a total of 9 overpasses and weatherproof corridors along the street are set up in the central urban area of Longgang, connecting subway stations, bus stations, businesses and residential areas, which has the originally isolated and closed urban functional groups connected together in a three-dimensional way, which realizes the all-weather three-dimensional and convenient traffic network.In order to achieve a three-dimensional connection in the city, overpasses need to adapt flexibly to the site by turning, extending, undulating and zooming in, that is to adapt to different design conditions through variation and growth on the basis of the same underlying logic. The enlightenment brought by the Nine Dragons Picture is also the same. The image of the dragon presents and highlights different emphases in different positions.With "dragon" as inspiration, combined with different locations of the overpasses, different streamline types will be different, four different types of bridges are used in the nine overpasses of the slow traffic system.