The historic Qingyang Palace is a Taoist palace that Chengdu people are familiar with, but few people know that there is a large-scale Taoist temple on the east side of Qingyang Palace. Erxianyu is the ancestor of Quanzhen Longmen Pai Dantai Bidong Zong, and used to be the center of the important preaching jungle and engraving Taoist scriptures in the southwest region.