Jianshan is the third mountain in the family of Langwushan Mountain, which is 87.33 meters high. Because the shape of the mountain is like a sword lying across the sheath, it is also called Jianji Mountain, because the mountain is like a blade, also known as the blade mountain. Among the five mountains of Wolf, the other four are vertical, but Jianshan is horizontal. The origin of the name of Jianshan is the most widespread because Qin Shihuang tried Baojian in this mountain more than 2000 years ago.