Take a piece of paper 15cm square, fold the crease into the shape of "m" on the paper, fold all four corners to the middle position, fold them up and down, fold the lower right corner to the upper side along the crease, and fold the lower left corner to the other side, so that the whole is a triangle.
Spread both sides. After unfolding, fold the two corners in half and flatten them down to make the triangle square, and the two pockets in the middle are unfolded to both sides. Open it and press it forward so that the two corners are close together. It is the mark of two small white circles marked in the picture. Fold the two corners together and line them up.
Just fold the left and right sides in half, and fold the other side to the middle line as shown in the figure, so that the right side forms a triangle, and then fold the triangle in half to the middle position. Then repeat this step on the next floor. The left and right sides are folded differently. The left side folds directly to the middle crease, thus folding out an official hat.
Official hat: Official hat refers to the black hat worn by ancient civil servants, indicating the rank of official positions.
Quote and explanation: Ming Ruoyu's History of Minister Si Zhongzhi Munei: "The official hat is made of bamboo silk, which is really blue and crepe, and is worn from the royal family to the eunuchs." Mingyangji's poem "A Message to the West Caotang" says: "The black veil official hat is half-browed, and the purple bamboo fishing rod is long in the hand."