Why is Ni's Qian hexagrams six hexagrams?

Qian hexagrams is a method of calculating hexagrams with six coins, which is said to have been created by Zhou Wenwang, so it is also called Wang Wen's sixty-four hexagrams money lesson. Money divination starts with six copper coins, shakes them a few times and arranges them in a row. According to the front and back of copper coins, corresponding divination images can be obtained.

Divination is a folk method to predict fate. It originally refers to the process of deduction and calculation based on the hexagrams recorded in the Book of Changes, supplemented by props (Oracle Bone Inscriptions, copper coins, yarrow, etc.). ). Used to predict good or bad luck. Later, it was extended to refer to divination in general, such as fortune telling, touching bones, four-column numerology, and six-column feng shui prediction.