How does Zhouyi divination distinguish yin and yang?

This problem really bothers many people: the division of yin and yang is like this, yang is simple and yin is complex. For example, a copper plate or iron plate with words or flowers on one side and blank on the other side, then the blank is yang, and the words or flowers are yin, which is closely related to the two hexagrams of Gankun. In addition, let's talk about Bao Tong, Gan Long, with Bao Tong, Gan Long on one side and Manchu on the other. Manchu is masculine and Chinese characters are feminine. Let's talk about coins now, whether they are one yuan, five cents or ten cents. One yuan (that is, the front) is yin, and the national emblem or chrysanthemum (that is, the back) is yang.

Then talk about old Yin Lao Yang, less Yin and less Yang. Three coins, one head (yin) and two tails (yang), this combination is less yin, because less is the most important. Three coins, one tail (male) and two heads (female), this combination is called Shaoyang. Three coins and three tails (Yang) (Yang) (Yang), this combination is called because they are all Yang. Three coins, three heads (Yin) (Yin) (Yin), this combination is called Laoyin, because they are all Yin.