The Taiyuan Basin is surrounded by faults caused by the extrusion of the Eurasian continental plate by the Philippine Sea plate. It is a basin in the eastern part of Taiwan. Due to the difference in lithology, the Duluan Mountains are hard igneous rocks, which constitute the main mountains of the Coastal Mountains; the opposite large port The layer is relatively loosely cemented sedimentary rock, mostly forming low and gentle hills. In the process of weathering and erosion, the surrounding large port layer is lowered, forming the largest basin in the coastal mountains, also known as the plateau basin.