The mysterious road is the door to all miracles. In the martial arts culture and the traditional Taoist culture, the way to cultivate truth is called "metaphysics". Xuanmen's cultivation of truth has gone through many vicissitudes. By the time of Tang Gaozong (AD 650), the Xuanmen Jiuhua was finally opened. If it is famous for practicing Buddhism, it is the eighty-one pulse of five schools and nine schools. The so-called five sects are the "five secrets of the door", that is, the five sects that teach others the skills of guarding the cave. They are listed as mysterious miracles, not taught by virtue and greatness. They are "Wuji Gate, Dante Gate, Zhen Xuan Gate, Jianxian Gate and Fuzhuan Gate".
The Wuji Gate takes the philosophy of advocating truth by doing nothing and wandering in the infinite as the purpose of cultivating truth, and later it is divided into the schools of infinity, Taiji, Ji Ling, congenital, natural, carefree and mixed elements.
Dandingmen regarded harmony, copulation and life of lead and mercury as an important task of alchemy, and later it was divided into schools such as then, Quanzhen, Taiyi, Donghua, Chunyang, Lingbao and Sanfeng.
The Sword Fairy Gate, which waits with fasting heart, casts swords with the god of steelmaking and transports them in the air, which is invisible and detached from the realm. It is later divided into Excalibur, Wisdom Sword, Xuanjian, Xia Qing, Huashan, Zhongtiao and Jiuhua.
Fu Zhuanmen is a kind of magic to save the world by printing the soul, cursing and catching the spirit, and then it is divided into Zhengyi School, Shangqing School, Shen Xiao School, Wei Qing School, Jingming School, Tianxin School and Huayang School.
Xuanzhenmen is the secret of becoming immortal, which later evolved into Zhen Xuan, Tian Xuan, Xuanwu, Zhenwu, Zixiao, Taixuan, Taihe and other schools.