The three caves refer to the true sutra of the cave, which was written by Tianbaojun, the founder of the cave in Jade Qing Dynasty, also known as the Ming Sutra of the cave. The True Classics of Dong Xuan Department, published by Ling Baojun, the founder of Shangqing Dong Xuan, is also called Dong Xuan Ling Bao Jing. Shenbaojun, the founder of Taiqing Cave, published the True Sutra of the Cave God Department, also known as Huang San Cave Nerve.
Four auxiliary means too mysterious, too peaceful and too clear, whether it is one or four.
Twelve categories refer to three caves, which are divided into three parts: words, spells, jade tricks, spiritual diagrams, scores, words, prestige, methods, various techniques, biography, praise and performance.