Calligraphy format is divided into three parts: fighting square, three parts, contrast painting, nave, banner, couplet and fan.
The length-width ratio of rice paper is 2: 1.
Tri-cut: cut into three pieces, and it becomes 1: 1.5.
Combatant: cut into two pieces, 1: 1.
Middle end: no cut, 2: 1.
Opposite diagram: two pairs, the size is uncertain.
Banner: single, vertical and banner.
Couplets: two couplets are paired, and the size is limited by the content.
Department: specific.