According to legend, Xie Lingyun designed a kind of clogs with movable teeth to facilitate mountain climbing. It is more convenient to walk in the mud by removing the front teeth when going uphill and the back teeth when going downhill. This innovation has brought great convenience to tourism activities and has been imitated by people, which is called "Xie". Li Bai, a poet in the Tang Dynasty, described his ambition to pursue lofty goals with "I put on liberation shoes and climbed the Qingyun ladder" in "Into the Wine". "Xie" symbolizes the spirit of pursuing freedom and lofty goals.