Among the Taoist schools circulating in the Southern Song Dynasty, there are also so-called followers of Jin Dannan, who inherited Zhang Boduan's theory of inner alchemy in the Northern Song Dynasty, despised Fu Yong and regarded outer alchemy as witchcraft. Because it is founded by Zhang Boduan, it can be called Ziyang School. Judging from its purpose of specializing in Neidan, it is similar to Quanzhen religion in the north, so people compare it with Quanzhen religion founded by Wang Zhongyang, saying that Wang Zhongyang School is the North School and Ziyang School is the South School. This division of North and South sects is related to Inner alchemy in Song and Yuan Dynasties. Lian's Preface to Send Xu Xuedao to the South of Fujian says: Since the Song and Jin Dynasties, the speaker has been enthusiastic, and there are two factions in the north and the south: the south faction is Tiantai-Cheng, and the north faction is Xianyang. Also, because it is considered that religion is not as good as what Wei Boyang said at that time, Jue's Wild Moon View also said:' There are two ways to preserve one's health: the northern ancestor is southeast Wei Boyang.'

Nanzong was founded later than Beizong, and its actual founder should be Bai Yuchan in Ningzong period of Southern Song Dynasty. However, in order to compete with the Northern Sect, his disciples Chen Shoumo and Zhan Jirui put forward a set of teaching departments according to some legends in the Preface to the Biography of Hai Qiong: Qian () spread to Haichan, Liu Chuanzhi spread to Zhang Pingshu (), Zhang Chuanzhi spread to Shitai, Shi Chuanzhi spread to Daoguang monk (Xue style) and Daoguang spread to Chenniwan (Xue style). In this way, the history of Nanzong is much earlier than that of Beizong; Even if it comes from Zhang Boduan, it is about a hundred years earlier than Beizong, and it is certainly older.

Bai Yuchan is the fifth descendant of Nanzong, that is, the fifth ancestor of Nanwu. After him, "Nanzong" formally established the Neidan School Nanzong Taoist Association. After soaring, the title was "Zi Qingming Road Real Person" and the world called it "Mr. Qing Zi". His philosophy introduced Confucianism into Taoism and the combination of Taoism and Confucianism.

The emperor fell to the ground and everyone died. Wuyi pine bamboo, sunset cicada singing. -"Collected Works of Mr. Gui Qiong Yu Chan" Volume 6 "Zhu Wengong's Praise and Comment"

Moreover, his Endless Illustration is written in imitation of Zhou Dunyi's Taiji Illustration, and his works not only absorb many thoughts and vocabulary of Cheng Hao and Lu Jiuyuan's Neo-Confucianism, such as "All laws are born of the mind, and the mind is the law" (Volume 4 of A Record of Hai Qiong Bai), "The supreme heart is the heart, that is, the heart is the Tao, the six roads are inside and outside, and the overall scenery is the same" (ibid., in addition, As we all know, Su Shi's thoughts are deeply influenced by Laozi's philosophy and Taoism's idea of keeping in good health, and so is Bai Yuchan, who regards Su Shi as his family. Su Dongpo is often called "Broken Immortal" in the poems of Bai Yuchan ancestors, which can be used as a reference for those who know Su Shi.