What do you need to master first to learn numerology?

The five techniques are mountain, medicine, life, physiognomy and divination.

Numerology belongs to "life"; Faces belong to "phase". These are two different levels. But the five techniques finally figured it out.

First of all, we should learn Yin-Yang, Five Elements and heavenly stems and earthly branches. If we want to study systematically,

If you want to study traditional numerology and facial features,

The numerology recommendation starts from the three life meetings, descending the essence of heaven and calming the true spring.

Faces can be "Ma Shen Yi Xiang" and "Liu Zhuang Shen Xiang".

If you are not interested in classical Chinese, but just want to understand it, but don't want to study it in depth, you can look at the works written by modern people. There are many of them, especially the new eight characters now. I searched many books on Taobao. For example, there are many in Li Juming, Li Hanchen and Hu Yiming.