"Lingbao Bifa", written in the Han Dynasty. The full name is "Secret Teaching of Zhengyang Zhenren's Lingbao Bifa", also known as "Zhongli's Teaching of Lu Gong's Lingbao Bifa". Zhongzi Yunfang, Taoist name "Zhengyangzi". The title of this book is "Preface to Zhongli Yunfang of Zhengyang Zhenren" and it says: "The servant admires the virtuous people and has the great road in his heart. Unexpectedly, he takes up weapons and weapons. When the world is in danger, he first escapes and leaves the rivers, lakes and valleys. When he retreats, he will be conscious and attentive. Only in Qing Jing Xi Yi's "Ling Bao Bi Fa", "Zhong Lu's Teaching Collection" and "Tai Chi Cultivation Zhi Xuan Tu" are the main classics of Zhong Lu's direct transmission of the alchemy method of the Xishan School. Judging from its characteristics, it belongs to the evolution of "Lingbao Bifa".