How to divide people's age segments?

According to the new age division method, a person's life is divided into six age groups:

1, 0 (newborn) -6 years old is an infant;

2. Children are 7- 12 years old;

3. 13- 17 years old is a teenager;

4. 18-45 years old is a youth;

5, 46-69 years old is middle-aged;

6、gt； 69 is old age.

Extended data:

Traditional division of labor:

China is divided into four age groups according to age, which are youth group (under 29 years old), middle-aged group (30-39 years old), middle-aged group (40-49 years old) and middle-aged group (over 50 years old).

Fetuses, infants 0-0.6, infants 0.6-2, children 3-6, adolescents 7- 14, youth 15-35, middle-aged 36-60 and elderly 6 1-, are generally divided.

Generally speaking, the ancients divided the time like this: when children were under 12 years old, and when they were over 12 years old, they were called the age of young generals. The weak crown at the age of 20 is youth. Some people think that after 18, a young man stands at the age of 30 and he enters middle age. He is called a mature man. He knew his destiny at the age of 50, and of course he is old.

Baidu Encyclopedia-New Era Subdivision