After returning to his hometown, Ruan participated in the compilation of Ruan's Genealogy and wrote the Preface to Ruan's Genealogy. "The beginning of Nguyen thi, yesterday vassal states also. Since three generations, Daya has discovered the surname of Kao Jue. Through the Qin and Han dynasties, there was a tendency of Ruan, which was a secretariat, and the Qing Dynasty was still good ... ""My ancestors were able to be public and gave birth to seven children. The seventh son, Xi Shaogong, gave birth to nine sons. He is very long and says he is young and energetic. Born at the foot of Zhang Wanfeng, he was an official and an ancient historian because he was in charge of Ningde Salt Field. He is the ancestor of Yu Ningde Yujiang ... Yu Zengjian is the general manager of Pingjiang House in Suzhou, Nanjing, and was born in Nanxingqiao Yuyuanfang. " "Yu He Zude, the top scholar in Xianchun Ugly Family, was an official outside, but the thought of respecting ancestors and thinking of Qiu first, so I didn't care about my martial family ... my level was full, and I returned to the south, and I found catalpa, so I kept my house and the tree was still there. The uncles, brothers, sons and nephews of the clan are all poetic and gentle. With genealogy, soldiers are insensitive and dare to forget what they are doing? " In the preface, the origin of Ruan family in zhang wan and the process of ancestors' spreading branches and leaves are clarified, and we have already felt the merits of ancestors.