Liu Xiang (about 77-6 BC), also known as Liu Gengsheng, was a Confucian scholar, bibliographer and writer in the Western Han Dynasty. Pei county (now Jiangsu) people. Formerly known as self-improvement, the word is positive. Grandson of King Jiao Liu IV of Chu Yuan. When Xuan Di was declared emperor, he advised doctors. Yuan Di, Zong Zheng. Against eunuch Gong Hong, Shi Xian went to prison, waiting to be released. Later, he was imprisoned for anti-Gong and anti-Xian. After the emperor acceded to the throne, he was hired as Dr. Guanglu and changed his name to "Xiang", which comforted the official school. I was ordered to lead the school secretary and wrote Bielu, the earliest open book catalogue in China. Treating the biography of Liang in the Spring and Autumn Period. He wrote 33 poems, including Nine Sighs, most of which have been lost. Today, there are books such as New Preface, Shuoyuan and Biography of Lienv. And The Five Classics was compiled by Ma Guohan and A Qing Dynasty in Yi Tong. The original compilation was lost, and the Ming people compiled it as Liu Ji.