Yan's genealogy, arranged by generation, is: "When was the genealogy revised?" ?

My surname is Yan, too. According to my family tree, my father's grandfather's grandfather was stationed at that time and was ordered to go to Xikang Province from Suzhou, Jiangsu. At that time, he went to two brothers in two towns. In the 1980s, the two films were still in contact. As far as I know, the existing population of our part is around 500. I know that my grandfather is a "C" generation and my father is a "letter" generation. But it's a pity that I left home in the 1990s, and I'm a girl, so I didn't enter the family tree, so many details are not clear. It is a great pity that my father died at the age of 80 last year, but as a part of Yan's blood, he still kept it in his heart. Also keep in mind the family motto "solemn home, don't marry!