Why does the front of the coin in the Book of Changes represent the number 3 and the back represents the number 2?

The Book of Changes pays attention to the three talents of heaven and earth, so the divination in the basic eight natural phenomena ends with three hexagrams. Even when calculating divination, it ends with three times, and so does the coin. It takes three throws to decide the number. The explanation of the Eight Diagrams is based on Zhou Wenwang's sixty-four hexagrams, so nine is Lao Yang, six is the number of old yin, and Lao Yang and old yin are the boundaries of yin and yang. Therefore, the highest sum of the three coins is 9, and the lowest sum is 6, so the upward and outward sides of the coin are positive, while the downward side is negative, and the downward, reverse and inward sides are negative, so 9/3=3 and 6/3=2. Therefore, in the Book of Changes, the forward side of the coin represents the number 3 and the reverse side represents the number 2.