The size of the four-foot screen comes from the size of the four-foot whole (also known as the four-foot whole propaganda, commonly known as the full four-foot) rice paper folded horizontally, and the size of the four-foot whole is 68/ 136 cm, so the standard of the four-foot whole screen rice paper is 34/ 136 cm, and the four-foot whole screen is 34/ 136 cm.