Besides metrical poems, shouldn't other poems be about leveling?

No, except for metrical poems, other poems (classical poems) are free in meter and antithesis, even in level and level, wide in rhyme and unlimited in length.

Classical poetry is a genre of poetry. It's also called antique. In terms of the number of words in poems, there are so-called four-character poems, five-character poems and seven-character poems. Four words are four words, five words are five words and seven words are seven words. After the Tang Dynasty, it became a modern poem, so it is usually divided into five words and seven words. Five-character ancient poems are referred to as five ancient poems for short; Seven-character ancient poems are referred to as seven ancient poems for short, and those who use three, five and seven characters at the same time are generally considered as seven ancient poems.

Ancient poems include ancient poems (poems before Tang Dynasty), songs of Chu and Yuefu poems. Pay attention to the styles of ancient poetry such as Song, Song Xing, Quotations, Qu and Ling, which also belong to ancient poetry. Classical poetry does not talk about antithesis and rhymes freely. The development track of classical poetry: The Book of Songs → Chu Ci → Han Fu → Han Yuefu → Wei, Jin, Southern and Northern Dynasties Folk Songs → Jian 'an Poetry → Tao Poetry and other literati five-character poems → Tang Dynasty Ancient Style New Yuefu.