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1. Fold the long side of the rectangular paper twice (bai not fold in half), that is, divide the paper into three parts and then fold it in half along the middle line
Open and leave a stamp
Similar to elementary school paper stack grid
2. Fold the two copies
That is, the middle one and the upper and lower one are folded
3. Fold the paper toward the center line
Like folding the door
Then put your finger into one of the double doors
Press down the paper
Form a triangle
Another folding door in the same way
4. Fold more than part of the triangle to the triangle
5. Fold the last part of the paper in the same way
6, finally prop up the middle seam by hand