Jiuxiang lies in Yiliang County, where a provincial register identifies a 5,336-hectare canyon-and-cave national geopark. The protected landscape contains different places and histories. One is Zhangkou Cave, described in an archaeological paper published in Acta Anthropologica Sinica in 1995.
Author Hu Shaojin places Zhangkou on a slope beside the Maitian River gorge, within the Jiuxiang scenic area. The cave developed in Dengying Formation dolomite. Stalactites and stalagmites divided its interior into seven chambers in the published plan, turning a single cave name into several connected spaces.

