How to treat the levelness of five metrical poems in Li Bai's Thoughts on a Quiet Night?

I think, firstly, the Tang Dynasty is the watershed between classical poetry and modern poetry (metrical poetry), and modern poetry did not mature until the middle Tang Dynasty, so it often appears that classical poetry and modern poetry are mixed. such as

The foot of my bed is shining with such bright light.

Flat and light.

Is there frost already?

be plain and simple

I looked up at the moon.

Ping, ping, ping.

Looking down, I feel nostalgic.

Ping, ping, ping.

This is a rhyming five-character quatrain, but the first sentence violates the taboo of metrical poetry. It is impossible for a poet like Li Bai to make such a low-level mistake. Judging from the distinction between 135 and 246, it meets the requirements. This is a mixture of classical poetry and modern poetry. The meter of the last two sentences was recognized as the meter of modern poetry at that time. In fact, this is the same as the transition from classical Chinese to vernacular Chinese. 19 19, the new culture movement began to advocate vernacular Chinese, but 30 years later, 1949, many scholars' articles were still half written and half written.

Second, when a poet writes a poem, he puts artistic conception first, followed by meter. There are quite a few excellent works in the poems from the late Tang Dynasty to the Ming and Qing Dynasties that do not conform to the rhythm of modern poetry, especially Du Fu's poems, which follow one's inclinations, pay little attention to the rhythm, but pay great attention to the artistic conception, which may be the reason why they are regarded as "poets"!

Take the current couplets as an example. A considerable number of couplets do not meet the requirements of the Couplet Rules promulgated by the Couplet Association, let alone the requirements of "antithesis", but they are very popular. Why? Good mood, festive.