1, blow up the balloon first, and the bigger the balloon, the better; Tie the balloons together, pink and pink, purple and purple.

2. Press the purple balloon and the pink balloon together and let a pink balloon and a purple balloon pass through.

3. Then wrap the pink and purple balls.

4. Complete the above steps to form a balloon group consisting of four balloons, which is the basis for making balloon arches. Repeat this step to determine the number of balloon groups.

5. Find a long nylon rope or a strong rope and wrap it around the hook or door handle. Take a group of balloons from above and tie them to the rope. Then wrap the gunpowder and purple gas ball with a rope twice and fix the balloon twice.

6. Then take out a group of balloons, stagger them with the previous group, put your hands on them, then wrap two balloons in a circle with a rope, and then wrap two balls outside this group of balloons twice.

7. Repeat this cycle to make a balloon chain, which can be hung indoors and outdoors as decoration; If you make a balloon arch, it's a little long, maybe 5 meters is enough.

8. Prepare an aluminum-plastic PVC pipe or something similar, which can be bent at will and pressed into the gap of the balloon chain.

9. Do a good job in foundation welding. If there is no such foundation, it can be made of cement. The specific method is: put some small round cement paint barrels with no bottom, and then insert a cement tube for rapid prototyping, such as pulling out the tube and putting it in the barrel, and naturally drying it, which is a bit like honeycomb coal.

10. Insert the balloon chain and tube into the base, and the balloon arch will be finished.