Introduction to the Stone Mortar Group: The Jiulong Cave Stone Mortar Group is located under the pit end of the downstream of Nanxi Village, Xiaoyang Town, Fu'an City. The stone mortars here are not only numerous but also strange. They have high scientific research value on the geology of potholes and are also aesthetic works of art. the title. On the cliff is a large stone mortar that looks like a "sliding slide". Under the cliff, the large and small stone mortars are arranged in the turbulent place of the clear stream, with different shapes and abrupt and rugged shapes. Walking into this group of stone mortars is like walking into a dream world and an exotic fairyland.