Liu Yuxi (772 ~842) was born in Luoyang, Henan, and his ancestral home was Xingyang, Zhengzhou, Henan. He said, "His family was born in Xingyang, and he was born in Luoyang". His ancestor was Liu Sheng, the king of Zhongshan (a descendant of Xiongnu). Ministers, writers and philosophers in the Tang Dynasty were called "poets".
In the ninth year of Zhenyuan (793), Liu Yuxi was a scholar, first as a proofreader of the prince, then moved to Huainan to join the army, and then joined the Du You shogunate, which won Du You's trust and esteem. Du You entered the DPRK as prime minister, and Liu Yuxi also moved to the empire. At the end of Zhenyuan, he joined the "two kings and eight horses" political group headed by the prince.
After Tang Shunzong ascended the throne, Liu Yuxi participated in the "Yongzheng Innovation". After the failure of innovation, it was repeatedly relegated. In the second year of Huichang (842), he moved to be the guest of honor of the Prince and died in Luoyang at the age of 71. He was posthumously given to the Minister of Housing and buried in Xingyang.
Liu Yuxi's poems and essays are excellent and have a wide range of topics. He and Liu Zongyuan were also called "Three Masters" with Wei and Bai Juyi, and "Bai Liu" with Bai Juyi, leaving behind such famous works as Humble Room, Zhi Zhu Ci, Yang Liuzhi Ci and Wuyi Lane. Liu Yuxi's three philosophical works, The Theory of Heaven, discussed the materiality of heaven and analyzed the origin of the theory of destiny, which is materialistic. He is the author of Collected Works of Liu Mengde and Collected Works of Liu Binke.