As "Poet Fairy" and "Poet Sage", these two titles are only honorifics for future generations. After all, they are just poets who solve problems for the people and occasionally write a few poems to express their feelings. Because they also looked down on corrupt officials in the imperial court and did not follow the crowd, both of them chose to give up their official positions and travel around, although some of them were demoted. But when it comes to why they become CP together, a large part of the reason is related to their poems, which generally express the same meaning. Mainly the different styles of poetry, one is romantic and the other is realistic. One dares to speak, the other is obscure.
Their poems were so influential that after their death, they were awarded the title of "Du Li". Then the problem is easy to understand. If their names are linked together, over time, they will be passed down as CP. After all, the word CP is quite popular now.
Li Bai is in close contact with many poets. We know that he is Zhang Zhi. According to legend, when Emperor Xuanzong of the Tang Dynasty called Li Bai to Beijing, he met him and they hit it off. After listening to Li Bai's Hard Road, He Zhangzhi couldn't help but sigh "Wonderful, Wonderful" and even praised Li Bai as a satellite from heaven. Therefore, Li Bai later had the reputation of "fallen immortals".
Li Bai also made friends with great poets such as Gao Shi and Meng Haoran. I also wrote the sentence "I love Master Meng, and your fame rises to the sky", which shows that they are friendly. As for Gao Shi, he lost contact because he didn't develop on the same road later. In short, great writers like Li Bai usually make friends with some great writers. But in fact, Li Bai and Du Fu do not have much in common.
Perhaps because of this, the "love" between them is more precious. Mr Wen Yiduo, a famous writer in China, once said, probably. The encounter between Li Bai and Du Fu, in the history of China, no one can compare with them except Confucius and Laozi. They are just two stars in the sky, and nothing is more memorable in a culture with a long history of thousands of years.
Li Bai and Du Fu, as great poets in the prosperous Tang Dynasty, undoubtedly supported the poems of the prosperous Tang Dynasty and even China, and also supported the literature of China. In the history of China, there may be no one except Confucius and Laozi. However, there is not much connection between their poems. Li Bai wrote Du Fu's songs. Du Fu wrote more about Li Bai, about a dozen.
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This also shows that Du Fu appreciates and cares more about Li Bai. Because their poems were very influential at that time, and their poems were catchy. Up to now, with the title of "Du Li", they naturally developed into the current CP. This is the operation of boring netizens, or perhaps the fate of Li Bai and Du Fu's "love".