Seven-character quatrains, a genre of China's traditional poetry, belong to the category of modern poetry. They consist of four sentences, each of which has seven words, and have strict metrical requirements in rhyme and cohesion.
Seven-character quatrains developed from the seven-character poems of the Five Dynasties and the _ Dynasties, formed in the Tang Dynasty, and were included in the imperial examination. They are strictly flat and rhythmic, short and pithy, and rich in content.
Therefore, writing seven-character quatrains is a kind of poem that tests the basic skills of poets most. There are only four sentences in the whole poem, each with seven words and twenty-eight characters. There are four kinds of prosodic formats, and there are many great poets in the Tang Dynasty, among which seven-character quatrains are the irreplaceable essence of Tang poetry.