Introduction to Guniuzhai: The peak of Guniuzhai in the southeast corner of Caoshan Mountain, with an altitude of 4017.3 meters, is the main peak of Wumeng Mountain in northeastern Yunnan. The mountain peak is steep in the south and gentle in the north. It rains and snows all year round, and is often covered with clouds and mist. It looks like a cow playing with a sea of ​​clouds, hence its name. According to legend, in 787 AD, Yimouxun, then king of Nanzhao, imitated the practice of conferring the Five Sacred Mountains in the Central Plains, and consecrated the Five Sacred Mountains and Four Mountains in his territory. The Dahaicaoshan Mountain in the east of the territory was named Dongyue Jiangyunong Mountain.