古代哲学家孟子有云，“不孝有三，无后为大。”

“THERE are three ways of being an unfilial son,” argued Mencius, an ancient Confucian philosopher.

家庭文化为例子，中国传统文化重纵向血脉相承，古时有，“不孝有三，无后为大”之说。

For example, the family culture of Chinese traditional culture, the longitudinal veins in weight, "the author for three, without unfilial to big," said.

历史上有“不孝有三，无后为大”的说法，不孝的行为很多，但是没有孩子，没有人继承地位、姓氏，这是最严重的事项。

History, "a three unfilial, without issue," saying that many of unfilial conduct, but no children, Nobody inherited status, family name, this is the most serious matter.