Ask for a detailed introduction to the books of one yuan, two instruments, three talents, four elephants, five elements, six rivers, seven stars, eight diagrams and nine palaces.

I didn't say "one yuan, two instruments, three talents, four images, five elements, six rivers, seven stars, eight diagrams and nine palaces" in the Book of Changes.

These are all theories. It's nothing. . . . . . . . . .

One yuan (space)

Two kinds of instruments (Tai Chi-Yin and Yang)

Three talents (heaven, earth and man)

Four images (Taiyin, Shaoyin, Sun and Shaoyang-namely, wood, fire, gold and water)

Five elements (wood, fire, earth, gold and water)

Liuhe (up and down four directions-six directions, generally referring to the universe or the world)

Seven Stars (No-The Big Dipper is Shu Tian, Tian Xuan, Tianji, Tian Quan, Yuheng, Kaiyang and Yaoguang. Count one; ; ; Twenty-eight nights, seven nights in the southeast and northwest, not taken out alone)

Eight diagrams (dry represents the sky, Kun represents the earth, ridge represents water, far represents fire, earthquake represents thunder, gen (gèn) represents mountains, Xun (xê n) represents wind, and exchange represents ze. )

Jiugong (that is, Luoshu)

Many things are irrelevant and meaningless. What do you want to learn? . . . . . .

Fortune telling? If there are many kinds of orthodox fortune telling, there is no need to learn them all. . . . .

Eight characters (learn the five elements of heavenly stems and earthly branches, you can get started)

Liuyi (learning from heavenly stems and earthly branches and five lines of gossip)

Plum blossoms are good (Yijing, Tiangan, Dizhi, Wuxing and Bagua)

Strange gate (heavenly stem, earthly branch, five elements, eight diagrams)

. . . . . . . . . . . . . . . . . . . . . . . . .

Your question is too general.

Tell me what you want to learn and I'll give you a recommendation. . .