Nanyue Tiantai School, one of the Shangqing tribes. In the Tang Dynasty, the Shangqing school took Maoshan as the mountain, arrived in Simacheng Town, and opened Tiantai Mountain Taoist School and Hengshan Taoist School. Sima Cheng Town (647-735), with a slightly hidden word and a hidden name, was named Tiantai Baiyun and Chicheng lay. He was born in Wen Ren, Hanoi, and is a descendant of the King of Jin. He studied under Pan, lived in Songshan, taught seal script and baiting, and then lived in seclusion in Tiantai Mountain. Wu Zetian heard his name, called to the capital, and he lowered his hand to thank him. During Zong Rui's reign, he also investigated the matter of Yin and Yang. Xuanzong built a view for him in Wuwangshan under the guidance of law. In the 23rd year of Kaiyuan (735), he died, presented Dr. Yin Lu, called Mr. Zhao, and wrote an inscription for the royal family. Sima Cheng lived in Tiantai Mountain, kept close contact with many literati at that time, and became "ten friends of immortals" with Chen Ziang, Lu Zangyong, Song and Li Bai, which expanded the influence of Maoshan School (Shangqing School) among literati. There are also many achievements in Taoist theory, including more than ten works such as On Sitting Forgetting and Tian Yinzi. Xuanzong of the Tang Dynasty was once a Taoist priest. He was the imperial teacher of three generations: Wuhou, Zongrui and Xuanzong. According to "Tang Wuwangshan Zhongyantai Monument" and other records, Sima Cheng once lived in Tiantai Mountain after studying in Songshan, and had female Taoist Xie Ziran and other disciples. When I was in Nanyue, I had a disciple like Jichang Xue. Since then, Ying, Tian Feng, Chen Muji, Xu and Liu, Feng Chuan and Ye Zang, Chen Muji passed on Liu Jie, Xu Zaichuan passed on Zuo Yuanze, and Ying Yijie passed on Du Guangting. Besides living in Nanyue, Tian and Feng first lived in Nanyue, and Yuanhe (806-820) went to Tiantai together. The rest, such as Chen and Xu, live on the rooftop permanently.

Reference: China Taoist Dictionary edited by Hu (Beijing: China Social Sciences Press, 1995). Qingxitai, ed. History of Taoism in China Volume II (Chengdu: Sichuan People's Publishing House, 1996).