What are the forms of ancient poetry?

The so-called ancient poetry refers to the poems written by ancient people. In other words, historically, 1840 all the poems written by the ancients before the Opium War were ancient poems. There are two categories of ancient poetry: ancient poetry and modern poetry. Ancient poetry refers to the poems before the Tang Dynasty, such as The Book of Songs, The Songs of Chu, and even the poems of Tao Yuanming. This kind of poem has no metrical requirements, and its rhyme is relatively free. It's a semi-free poem. Following the Book of Songs and Songs of the South, a kind of poetry called Yuefu rose in the Western Han Dynasty. It was collected, arranged and arranged by Yuefu, the music organization of the government at that time, so it was called Yuefu. Yuefu was a peak in the Han Dynasty and even the Southern and Northern Dynasties. In the Tang Dynasty, with the development of phonology, poets had requirements for the phonological format of poetry. This is modern poetry, also known as metrical poetry. Metric poems are divided into metrical poems and quatrains according to the number of lines. There are eight lines in rhyme and four lines in quatrains.