Introduction to the Karst Stone Forest: The Sinan Stone Forest is mainly located in the Changba area, located on the north bank of the Wujiang River, stretching over 3 hills, with a total area of ​​5.6 square kilometers, and is mainly dominated by karst geological landscapes. Sinan Stone Forest is a typical karst slope stone forest. It is mainly composed of Permian limestone, which has been dissolved along joints and fissures, uplifted by the earth's crust, and eroded by water flow.