No need. There are two air inlets and two zippers at the bottom of both sides of the inflatable arch. First, tie the air inlet to the fan, unzip the zipper, and put the prepared counterweight or sandbag at the bottom of the arch. There are rope buckles on the arch. The length of the rope needs to be adjusted according to the customer's site. There will be big rope buckles on both sides of the inflatable arch to tie the rope. The zipper cover plays the role of adding sandbags or moving sandbags according to the actual situation, making the gas model more stable.