I want to learn eight characters, Qimen, Liu Ren, Taiyi and Wei Zi. Who will be my master?

Download books from websites such as Long Yin, Book Club and Tianji Yijing Forum. In numerology, reading nostalgic jokes, A Cai's articles and so on can clarify the context of learning. Liu Ren read Liu Ren Jin Baihe written by idle people in Beihai, and Li Gankun with Sleeves written by Xu Weigang. See "The Gate of Magic" in Zhang Zhichun. However, don't dabble too much. Not afraid of the door, but afraid of a skill.