260 meters southeast of the intersection of Shangmatou Road and Huilin Road. According to Baidu map information, the library of the city sub-center is located 260 meters southeast of the intersection of Shangmatou Road and Huilin Road in Tongzhou District, Beijing. The library of the city sub-center is located on the canal boat of the Beijing city sub-center. Its design concept stems from the red seal, a traditional cultural symbol in China. The tree-like building structure on the roof is like a forest umbrella, inspired by Ginkgo biloba leaves, which embodies the functional orientation of the library in inheriting knowledge and spreading culture.