1. Tie the balloon to the rope with a balloon strap. You can bind light green and pink balloons alternately to form a two-color effect, and pay attention to keeping the balloon spacing even and symmetrical when binding.

2. Fix one end of the rope on the vase or iron frame, straighten and fix the rope, gradually bend the rope tied with the balloon into an arch shape, and fix the other end on the vase or iron frame.

3, according to the need to adjust the shape and height of the arch, you can tighten or loosen the rope, so that the arch looks neat and balanced.