Yes, but it's not the ghost valley faction. Ghost valley is the originator of military strategists. Guiguzi is a summary of strategists' lobbying experience, and its value is self-evident. Sui Shu has a cloud: "Those who are vertical and horizontal, therefore, argue clearly and speak well, aiming at getting through." "If you are a man, you will make comments and turn danger into fraud. As for thieves, they will harm loyalty and destroy the country. " Although there was prejudice and discrimination against the study of vertical and horizontal in past dynasties, we can't deny the value of something just because it can be used in bad places. Guiguzi is called Wang Xu, also known as Wang Chan and Guiguzi. He is a mysterious legend in history, born in the Spring and Autumn Period. He often goes to Yunmeng Mountain to collect herbs and cultivate monasteries. Because he lives in seclusion in Qingxi Ghost Valley, he calls himself Mr. Ghost Valley. A famous thinker, strategist, strategist and educator during the Spring and Autumn Period and the Warring States Period, he was the originator of military strategists' thoughts and a mysterious figure in the history of China. He is known as a romantic figure through the ages. He is good at maintaining a healthy body, being good at psychological speculation, knowing the trend of combining rigidity with softness, and being familiar with the art of vertical and horizontal coitus, with unique wisdom. His disciples are military strategists: Sun Bin, Pang Juan and Wei Liaozi; Military strategists: Su Qin, Su Dai, Zhang Yi, Mao Sui; Alchemist: Xu Fu (Sun God).

Guiguzi was compiled by later scholars according to their remarks, and it was completely preserved in Taoist classic Daozang. The content is very rich, involving political, military, diplomatic and other fields, mainly about the theory of strategy.