Is pipa a a seven-character or a miscellaneous word?

Original pipa tour, pipa introduction. Song, line and quotation are three forms of ancient songs, which later became a genre of ancient poetry. Although the names of the three are different, there is actually no strict difference. Line is a kind of ballad of narrative and recording nature. Its syllables and meter are generally free, and its forms are all archaic with five words, seven words and miscellaneous words, which are full of changes.