Cut into two rectangles with a length ratio of width 2:1.
Expand.
Expand it to get the crease as shown above.
Fold the remaining part into a double triangle to get the look shown above.
The folded look.
Open the four corners like this and press them down.
The other corners are treated similarly.
The folded look.
The four corners are treated in this way, and they look folded.
The eight corners are treated this way.
Turn to the back.
Fold the left and right corners back.
Greeting cards cardboard heart-shaped origami
