In the literary history of the Tang Dynasty, there is a name that many people are familiar with: Liu Zongyuan. He is one of the "Eight Masters of the Eight Masters of the Tang and Song", and is known as "Liuhedong" and "Mr. Hedong". His literary achievements are extremely high, and one of the "Snow in the River" is world-famous. Chen Shangjun, Dean of Renzhong Academy of Fudan University, explained that Liu Zongyuan, a group of poets in the mid Tang Dynasty, had a more obvious tendency of individualization in their works, and advocated that "everything can be incorporated into poetry", which had a very obvious writing style. He said that Liu Zongyuan's poetry had a fair popularity in the Tang Dynasty, but it was not very "hot"; Su Shi, a great litterateur in the Song Dynasty, is not only a "fan" of Liu Zongyuan, but also has two authoritative comments: "hair is thin and luxuriant in simplicity, and taste is indifferent". That is to say, the extremely subtle and rich emotions are expressed in the simplest and most elegant language, and the deepest experiences of life are written in plain and indifferent words, revealing the subtle essence of Liu's poetry. Undoubtedly, he is a confidant who travels through time and space. With the praise of Sushi, Liu Zongyuan's poems became more and more famous. The friendship between poets dates back to the Tang Dynasty, with high literary achievements during the prosperous and middle Tang periods. The style of Tang poetry actually expresses a person's love for nature, integrating personal emotions into beautiful images, with a lasting aftertaste that needs to be read slowly. Liu Zongyuan, a group of poets, has a more obvious trend of individualization in his works, breaking the tradition of gentle and honest poetry since ancient China, advocating that "everything can be incorporated into poetry", which has a very obvious writing style. Liu Zongyuan has two good friends, Han Yu and Liu Yuxi. According to Chen Shangjun's research, Liu Zongyuan and Han Yu may have forged a friendship in their childhood. In his early years, Han Yu lived in Xuancheng for a long time. At that time, Liu Zongyuan's father happened to be the order of Xuancheng. The three people had different experiences. In the workplace, Han Yu's figure was softer than Liu Zongyuan's, and Liu Yuxi's character was stronger. His likes and dislikes were very fierce, and he didn't succeed in his early years, but the result was not bad. Liu Zongyuan is not so lucky. When he died, he gave his collection of essays to Liu Yuxi for compilation, and entrusted the future to Han Yu: that is, he hoped Han Yu would write an epitaph for himself and sum up his life. In the book "Poets of the Tang Dynasty I Know", Chen Shangjun put forward a point of view: Liu Zongyuan and Han Yu have different opinions in many aspects, and the friendship will remain unchanged for life. It is a pity that the two of them are good at writing poetry, curious about ancient times, proficient in martial arts, and have never joined a line. They rarely sing in unison. Liu Zongyuan's poems, essays, and poems are all well written, but in the Tang Dynasty, he may not be a famous poet at that time. Until the Song Dynasty, the great literary figure Su Shi appeared. His admiration for Liu Zongyuan has influenced many people. Chen Shangjun also held a point of view, "Liu Zongyuan's poetry was not so 'hot' in the Tang Dynasty, and became particularly famous after the Song Dynasty. One of them played a key role, that is, Sushi. He is a fan of Liu Zongyuan, and also a bosom friend who goes through time and space." Sushi was very happy with Liu Zongyuan's poetry, and evaluated his works with "hair thin and thick in simple and ancient times, sent to taste indifferent". In his opinion, "those who value dry talk are said to be dry outside but creamy in the middle, which seems to be simple but beautiful. It is also true that Yuanming and Zihou are the same." That is to say, in Sushi's eyes, Liu Zongyuan's poems are simple