First, if he is an ancestor of the Han Dynasty, he is also a descendant of Liu. Emperor Wu of Song's ancestor Wang and Han Gaozu's ancestor Liu Bang were brothers. "Book of Song Dynasty" records: "Emperor Gaozu was taboo, and the word Deyu, posthumous title sent slaves. He is the younger brother of Suiyuli in Pengcheng County and a friend of Wang. Fu born in Hong, Bi Qiang rich, Hou De born in Yang Temple, Jie Hou born in Desheng Yangcheng, Cen born in Anminsheng Yangcheng, Su Hou born in Yangcheng, Zong Zhengping born in Lingmou of Dongwucheng, Taishoujing in Donglai, Mingjingqian in Jingsheng, Doctor Hong in Qionglai, Xie born in Honglang and Wei Ding. Mixed Dong 'an Taishou Jing, Jingsheng County Gongcao Bridge, is for the imperial examination. " The Book of the Later Han Dynasty records: "Emperor Guangwu was born in Caiyang, Nanyang, the grandson of Emperor Gaozu IX, and was born in Changsha, Jingdi. I'll buy it when the tomb festival is over. I bought it, gave birth to Yulin Taishou, Julu returned, gave birth to Nantang and Qin gave birth to Guangwu. " Second, Liu Xiu refers to Liu Xin in the period of Wang Mang, so they are his family. "Biography of Han Shu Wang" said: "At the beginning, Xin was renamed Xiu in the first year of Jianping, and won the word". In other words, Liu Xin was renamed as Emperor Ai of Han Dynasty. Liu Xiu (Liu Xin) was also a friend of Wang after the younger brother of Emperor Han Yuan. Jiao Sheng gave birth to Hongfu, Fu Sheng gave birth, and gave birth to Yangcheng Temple Houde all his life. Desheng Guanglu gave birth to Doctor Xiang (whose real name was changed to Liu Xiang) and gave birth to Liu Xin.