each sentence of a poem is seven words or mainly seven words. Folk songs originated in pre-Qin and Han dynasties. However, there were few seven-character poems between Han and Wei dynasties, which gradually developed from the Southern and Northern Dynasties to the Sui Dynasty, and it was not until the Tang Dynasty that they really developed and became another major form of Chinese classical poetry.
Seven-character poem is one of China's poetry genres, with seven words in each sentence or seven sentences as the main part. According to legend, seven-character poems originated from Chu Ci and ancient folk songs. However, the development of Seven-character Poetry lagged behind during the Han and Wei Dynasties, and gradually developed from the Southern and Northern Dynasties to the Sui Dynasty. It was not until the Tang Dynasty that it really developed and became another major form of China's classical poetry.