In ancient times, unhappy people were called poems, and happy people were called songs. In modern times, they are generally called poems. It expresses social life and people's spiritual world according to certain syllables and rhythms. The origin of poetry can be traced back to ancient times. The development of poetry has gone through The Book of Songs → Chu Ci → Yuefu Poetry in Han Dynasty → Folk Songs in Wei, Jin, Southern and Northern Dynasties (represented by Jian 'an Seven Sons) → Tang Poetry → Song Ci → Yuan Qu → Ming and Qing Poetry → Modern Poetry and New Poetry. It is the oldest and most literary style.