The author is Han Yu. "Good work comes from hard work, and waste comes from playfulness." is Han Yu's famous saying. Han Yu (768-December 25, 824), whose courtesy name was Tuizhi, was born in Heyang, Henan (now Mengzhou City, Henan Province). He called himself "Junwang Changli" and was known as "Han Changli" and "Mr. Changli" in the world. An official, writer, thinker and philosopher in the mid-Tang Dynasty. In the eighth year of Zhenyuan (792), Han Yu ascended to the rank of Jinshi. He served as an official in Jiedu twice, and he was appointed as a censor to supervise the imperial censor. Later, he was demoted to Yangshan for commenting on affairs, and was given the positions of Wailang, an official in Lidu, editor of the History Museum, and Sheren of Zhongshu. In the twelfth year of Yuanhe (817), he served as Prime Minister Pei Du's marching Sima and participated in pacifying the "Huaixi Rebellion". Later, he was demoted to Chaozhou for admonishing and welcoming the Buddha's bones. In his later years, he became a minister of the Ministry of Personnel, and was known as "Han's Ministry of Personnel". In the fourth year of Changqing (824), Han Yu died of illness at the age of fifty-seven. He was given the posthumous title "Wen" by the Minister of Rites, so he was called "Han Wen Gong". In the first year of Yuanfeng (1078), he was granted the title of Chang Li Bo and worshiped in the Confucius Temple. Han Yu was an advocate of the ancient prose movement in the Tang Dynasty. He was respected by later generations as the head of the "Eight Great Masters of Tang and Song Dynasties". Together with Liu Zongyuan, he was called "Han Liu". Later generations will call him, Liu Zongyuan, Ouyang Xiu and Su Shi, the "Four Great Masters of Eternal Writing". The prose writing theories he proposed, such as "unity of literature and Taoism", "powerful words and appropriate words", "Wu Qu Chen Yan", "Words follow the order of words", are of great guiding significance to future generations.