Later, the demand for poetry gradually increased, and there was also a requirement for rhyme. So we look at the poems in The Book of Songs and Songs of the South, which are very simple and popular languages. But it rhymes.
Then it developed into the Sui and Tang Dynasties, and began to have the concept of modern poetry (of course, it was not called modern poetry at that time, but it was still called poetry. Modern poetry is the definition of poetry with specific meter and rhyme according to the development of poetry in Sui and Tang Dynasties. Since this period, there have been stricter standards for leveling, antithesis and rhyme. This is also when poetry reached a new height, people began to make new rules. Moreover, this rule can be said to be perfect, so that it has never changed, except that the mandarin of each dynasty is different, the rhyme is slightly different, and the level tone is slightly different. Even in our modern times, poetry in a narrow sense is still-modern poetry. Of course, poetry in a broad sense has not changed, that is, words that express meaning can be called poetry. So the lyrics of our popular songs are also poems.
The ancient poems you mentioned were hardly required before the Sui and Tang Dynasties (Tang and Song Dynasties), but the modern poems after the Sui and Tang Dynasties were required, but until now, people have also recognized and accepted poems other than modern poems. Therefore, it is very simple for the ancients to write poems, and it is not difficult for us modern people to write poems. Basically, anyone who can talk can write poetry.
But it is not easy to write a poem that will last forever. Just like writing an immortal article, it is not easy. For example, Chen Ziang's Youzhou Tower is a poem.
Where were those lost times before me?
And no one from behind.
Reflect on the infinity of heaven and earth
Alone, sublimated in sadness, tears welled up in my eyes.
This poem has no rhyme at all, the number of words is different from that of modern poetry, and even the length of sentences is different. But it's poetry. It will be sung through the ages.
As for many famous sentences in modern poetry, they are everywhere. But it is not easy to write such a poem. It is much more difficult to say the writing conditions of modern poetry than to write poetry. Learn to simplify sentences, master flat tones and learn phonology. Plain and simple, can talk, basically can see. Conciseness is not easy. It is simple to make four or eight sentences equal in words, instead of cutting off redundant words in one sentence. We often see four or eight sentences with the same number of words in our knowledge, but we can't see any meaning at all, just can't be concise. They cut sentences with knives and axes to make them shorter, but the meaning is fragmented. After conciseness, we should also consider phonology. As for phonology, we modern people have relaxed the standard, and all rhymes are counted as rhymes. However, before the Republic of China and the Qing Dynasty, there were special rhyming books, and only those with the same rhymes were counted as rhymes. Therefore, in order to conform to the rhyme of modern poetry, we usually compare it with a rhyme book before writing a poem. Such as Guang Yun, Tang Rhyme, Qieyun and Pingshuiyun. Therefore, it is difficult to write modern poetry, and it is normal to say that modern poetry is written in modern poetry. Moreover, if modern poetry is well written, people who have been immersed in poetry creation for more than ten years or even decades basically have a good foundation. However, it is still very difficult to write poems that have been sung through the ages. Now we often recite very good poems of the ancients, feeling how the ancients were so powerful and wrote so many good poems. In fact, this is the best poem accumulated in two thousand years, and then select the essence from it. Not every ancient scholar can write so many good poems casually.