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Age division standard of teenagers

The age division standard of teenagers: 0 (newborn) -6 years old is an infant; Children aged 7- 12; 13- 17 years old is a teenager; 18-45 years old is a youth; 46-69 years old is middle age; People over 69 are old.

The division of these five age groups has delayed human aging by 10 years, which will have a positive impact on people's mental health and anti-aging will. Before 1994, the international standards for classifying population problems were three age groups: children aged 0- 14, the labor force aged 0-5-64, and the elderly aged 64 or above (China is over 60).

Worldwide, the population is usually divided into 0- 14, 15-64 and people over 65. They are called juvenile population, adult population and elderly population respectively. The juvenile population coefficient is calculated according to the total population, and the adult population coefficient and the elderly population coefficient are also calculated according to the adult population, that is, the dependence coefficient = (youth). Internationally, the population aged 15-24 is also called the youth population.

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).

Generally speaking, the ancients divided the time like this: when children are under 12 years old, and when they are over 12 years old, they are called juvenile total angle age. 20 years old is still young, so you are young. Some people think that after 18, you will be young, and when you stand at 30, you will enter middle age. You will be called the prime of life and know your destiny at the age of 50. Of course, you will get old.

According to developmental psychology, it can be divided into: infant 0- 1 year, infant 1-2 years, infant 2-3 years, preschool 3-6 and 7 years, early childhood 6,7-112 years, and adolescence 65.