Four generations under one roof means that great-grandfathers, grandfathers, fathers and sons all live in this world and live together. Being under the same roof means being under the same roof; Live together as a family. The saying that "four generations live under one roof" originated from China's ancient book "Saint Amethyst". The original text is: "Great-great grandfather, father and body, body and son, son and grandson. From descendants to Xuanzang, it is the nine families and human relations. "

Four generations of grandparents: great-grandfather, great-grandfather, father, himself, son, grandson, great-grandson and great-grandson. Four generations may live under one roof.

The Holy Amethyst is a traditional enlightenment textbook in China. Among China's ancient classics, Saint Amethyst is one of the most popular and understandable readers. San Zi Jing is based on typical materials, including literature, history, philosophy, astronomy and geography, ethical justice, loyalty and filial piety. The core ideas of China's traditional culture include "benevolence, righteousness, honesty, respect and filial piety".

Three-character classics, hundreds of surnames and thousand-character texts are also called the three enlightenment books of Chinese studies. Saint Amethyst is a precious cultural heritage of the Chinese nation. Short, pithy and catchy, it has been a household name for thousands of years.