Ancient poetry is concise and has the characteristics of conciseness and jumping. It expresses as many meanings as possible in extremely limited poems. Its greatest feature can be summed up in one word: beauty in meaning, beauty in language, beauty in sound and beauty in form. In classical poetry, except for words and songs, most sentences are neat in length, and there are quite strict rules on the use of flat and even words. Some posts must use plain language, and some posts must use plain language!