Introduction to Wuliguan: The first pass, also known as Wuliguan, is located in front of Wangmeng Terrace, five miles away from Huashan Valley, so it is named after it. There are cliffs and high mountains to the west of this pass, and deep rivers to the east. Stone walls are built here, and the pass is set up according to the danger. One person is in charge of the pass, and no one can open it.