The diviner uses fifty straws, which matches the number of the sky and the earth, and deducts one that symbolizing him, to calculate every change in the world. Firstly he keeps one that symbolizes the Taichi, the ultimate; and then separates the rest into two piles, symbolizing two Yi. Secondly, he takes one and holds it between the little finger and the ring finger at his left hand, symbolizing the sky, the earth and the people; then he separates the rest by four in a group to simulate the changing pattern of the four seasons. Thirdly he takes his straw from his left hand to the right hand, and counts them four by four, then put the residue between the ring finger and the middle finger. This means the one leap year in three years in the lunar calendar. Then he does this similarly and put the residue between the middle finger and index finger, symbolizing the two leap years in every five years in lunar calendar. Then he takes out the straws in left hand to see the number of the straws. If it is a odd number it is a Yang symbol, showing the positive; and if it is a even number, it shows a Yin symbol, the negative. So there will be five numbers for odd number and even number, and 25 positive, 30 negative, 55 in total. This number is expandable, which cover the most tiny and great numbers. So we can see why Yiching is able to calculate all changes as accurate as the God’s eye.