Introduction to the martyrs: The former site of the Red Army barracks is located 1.5 kilometers north of the intersection of Xinbaiya Mine. The natural cliff cave is about 70 meters deep and 50 meters wide. There is a stream flowing out of the cave entrance all year round. It is located on three cliffs. It can accommodate tens of thousands of people and is also known as the "Ten Thousand Cave". It provided a secret and safe natural barrier for the Red Army to carry out revolutionary activities and guerrilla tactics.