Excuse me, in money divination, why should the face be yang and the word be yin?

Divination is divided into primitive divination, but it is not complete. In fact, there are complicated divination, hehe. Extreme extremes apply to the whole divinatory symbols, not just a single change. Of course, you are right. According to the changing rules of Lao Yin and Lao Yang, a single change is indeed a change of thought.

External hexagrams are upper three hexagrams, also called upper hexagrams, while inner hexagrams refer to lower three hexagrams, also called lower hexagrams. The internal and external hexagrams form six hexagrams, which is one of the sixty-four hexagrams.

By the way, I recommend a set of introductory tools for divination of the Book of Changes, Ling Yao-Yao Qian of the Book of Changes, which consists of copper coins, cards and books. It's simple. Books correspond to divination, divination, and then to the analysis of common problems such as fortune, career, love, travel and wealth. You can search. There is a lot of information on the Internet, and it is also introduced in Baidu Encyclopedia. All the questions you mentioned have answers.

With this thing, anyone can learn the divination method of the Book of Changes and six hexagrams. But only if you still study hard. In addition, if you are under 18 years old, it is not recommended that you learn these things, because you have insufficient life experience and there will be some deviations in your understanding.

I hope the answer will help you. :)