How to use the sixty-four hexagrams of Yijing on duty?

Take the four hexagrams of "Gankun Li Kan" in the Book of Changes, for example, because these four hexagrams represent the hanging phenomena of heaven, earth, sun and moon in the universe. These four phenomena have the strength that Yin and Yang's rigid, soft, fire, water and physical instinct will not happen, and the phenomenon of endless tangible changes. These four hexagrams are the original kinetic energy of everything in our world.

I took four hexagrams of Gan, Kun, Kan and Li, and there are still sixty hexagrams left. On the first day of each month, "Tungua" is on duty in the morning and "Menggua" is on duty in the afternoon, and so on, with sixty-four hexagrams as the order, two hexagrams are on duty every day for 30 days a month, and sixty-four hexagrams are arranged every month.

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