First, take a square piece of paper, fold it horizontally twice, then fold it obliquely twice, then open it, pinch the crease and fold it into a diamond, and fold it into a small triangle on both sides.

Fold the details of the hidden weapon.

Fold the back again like this and open it. Cut along the crease with scissors, and then fold the small triangle in.

Put the last part in order.

Finally, turn the corner over and fold it to the back, and then pinch it in the middle. Such a cool hidden weapon will be folded.

First,? Prepare the square paper you need.

Second,? First, fold the blue square paper roll into a cylinder and glue the edges.

Third,? Fold the orange square paper in half along the center line, and then fold the upper and lower sides of the right side towards the center line respectively.

Fourth,? Fold the upper and lower sides of the right side toward the center line,

Fifth,? Fold the upper and lower sides of the left side to the center line respectively.

Sixth,? Glue the orange origami and stick the blue cylinder in the middle.

Seventh,? Fold the green small square paper in half twice along the center line to make it match the size of the knife, stick glue on each side, then round the four corners and cut a small hole in the center, and finally put it on the handle to make a big knife.