The five elements of a pen belong to gold. The most popular way to define the five elements of steel characters: the number of strokes of Chinese characters (steel) (**9 figure), the three elements of genius, genius and geography are the single digits of the numbers of heaven, earth and people, and the three elements of heaven, earth and people count as ten. If the unit number is 0, it is calculated as 10. The relationship between the five elements is: wood, fire, earth, gold and water, which are adjacent to each other and separated from each other.