Introduction to Yulian Cave: Yulian Cave was built in the Yuan Dynasty. It was a place of practice selected by Qiu Chuji, a real person in Changchun in the Yuan Dynasty, and his direct disciples Sun Zhijian and Lu Zhizhong through divination. Yulian Cave is Quanzhen. The birthplace of the Longmen Sect, it is quiet, quaint and mysterious, making it an excellent place for Taoist retreat. This ancient Taoist temple was built under a cliff, like a group of suspended buildings embedded in the stone cliff.