The oldest literature which mentioned the events held on this day was "Simin yueling" (book on agricultural work), a book written by Cui Shi in the Later term of the Western Han period, and according to it, people aired out books on the day.
この日の行事について書かれた最も古い文献は後漢時代の崔寔が書いた『四民月令』であり、書物を虫干しにしたことが記されている。