How to make composite bow Baidu net disk with paper

Prepare a piece of A4 paper, cut it into squares, then roll it into a thin paper tube along one corner, and fix the end with adhesive tape. Repeat step 1 to make two tissue tubes. Cut off a part of each end of the paper tube (note: take the middle of the paper tube as the boundary, cut more at one end and less at the other). Press both ends with your fingers, then bend slightly outward and cut off a corner to make it more like a bow and arrow. Then tie the rope and you're done. If there is a CNC machine tool available, let me know first. Generally, you use aluminum alloy as the bow handle yourself. You can find your own drawings online, grind them slowly with a machine tool, and make a bow handle and an eccentric wheel. You can use glass slides or carbon sheets as bow pieces. You can buy one on the bowstring online. Okay, but it's really not safe.