What's the name of the seven-character poem?

Seven-character quatrains or seven-line quatrains. Seven-character quatrains, referred to as seven quatrains for short, are a genre of China's traditional poetry and belong to the category of modern poetry. This form of poetry has four sentences with seven words each, and it has strict metrical requirements. In terms of expression, the four-line dance requires concise language, lively rhythm, no flowery words, but rich connotations. In terms of expression, the four-line dance can not only express one's feelings, but also express one's views and attitudes towards things.