Historical background: The lowest peasant class in the old ages
Xu Shiyue, born in 1931, is from Xiashao, Beilun. He does not know where his ancestors come from; the only thing he knows is that the Xu family has been watching the ancestor shrine of the Shao family for five generations. They belonged to the lowest social class in the society, depending entirely on the family shrine of the Shaos.
Since the Ming Dynasty, they were banned from going to school, being government officials, or marrying other social classes. They were only allowed to held degrading jobs, like taking care of ancestral shrines or being barbers and butchers. Such discrimination was eliminated by Yongzheng Emperor and gradually faded since the Republic of China period.