The only mountain. Dashu Mountain is the remnant vein of Dabie Mountain. This Shandong is high in the south and low in the northwest. It is oval and formed by volcanic eruption. Volcanic cones, waterfalls, volcanic rocks, volcanic neck and other ancient volcanic relics are well preserved. Erya Shishan thinks that Shu means independence, because Dashushan is an isolated mountain without gangs and mounds, so it is called Shushan. According to "Luzhou County Records", "There are monks of Shu building houses here, and occasionally homesick water, which comes out of streams and tastes like Qutang Gorge, hence the name". So some people say that Shushan is named after it.