Bearing children used to be the top task of a family.This tough rule has stood for thousands of years.Having no kid is a source of pity and even filial impiety.

• 养育子女在过去被看作是一个家庭的首要任务，这一规则已经存在了几千年，没有孩子是一种遗憾甚至是一种不孝。