What's the number of a child?

1. Considering the twelve hours counted every day in China Gregorian calendar, children's time ranks first, and the number 1 can be used instead.

2. According to the pinyin of Chinese characters, the pinyin of zi is Zi, the letter Z is similar to the number 2, and I is homophonic with the number 1, so the number 2 1 can be used to represent Zi.

3. Think with the strokes of Chinese characters. Zi has three pictures, which are represented by the number 3.

Zi, a standard first-class word (commonly used word) in modern Chinese, is pronounced as zǐ and Zi in Putonghua, which was first seen in the Shang Dynasty in Oracle Bone Inscriptions. It belongs to pictograph in six books.