Of course. Butterfly costume began in the late Tang and Five Dynasties and prevailed in the Song and Yuan Dynasties. Is to fold the printed paper in half, align all the page numbers with the middle seam, stick them on another pack of back paper, and then cut them into a book. Butterflies can hold 300g paper, and butterfly binding is a common method. The advantage is that there is no binding line, the material is stiff, beautiful and generous, and the grade is high after mounting.