1, four corners to the center Yuyao Shenghe Electrical Appliance Co., LTD , https://www.yyshenghe.com
Toddler Origami - Simple Tray
2, the two sides folded to the center
3, the two sides are folded back to the center and then restored to 2
4. After the left and right corners are opened, the upper and lower sides are pulled up, and the left and right sides are folded along the dotted line to the center.
5, the two corners are stuffed into the box, you can stack many boxes together with different sizes of paper.