What is the purpose of punching holes in a banner?

After walking out of the cinema, our family happily talked about the contents of "Animal Story". Unknowingly, our car had already reached Dading Road.

I looked up and suddenly discovered a strange phenomenon: there were many round holes on the bright red banner, neatly arranged in rows. I shouted as loudly as if I had discovered a new world: "Mom, Dad, do you see why there are so many round holes on that slogan?"

My mother also said in surprise: "Where it is, where it is!" I quickly pointed it out to my parents.

Dad said with a smile: "Oh, I saw it, do you know why?"

I thought for a while and said: "I don't know, Dad, if you know, just tell us Let’s talk!”

Dad cleared his throat and said cheerfully: “The banner is hung so high, so the wind in the sky is stronger. The main purpose of punching holes in the banner is to reduce the wind resistance and increase the wind resistance. The life of the banner."

My mother said: "Yes, if the banner is punched, the wind can easily pass through the banner, the banner will not be easily torn, and the banner will not be blown around. Affecting the visual effect.”

After listening to my parents’ explanation, I suddenly remembered that when I went to my grandma’s house and passed by Qinyang a few days ago, I saw the banners there being blown by the wind, and the banners were also blown. It was blowing all over the sky, and I couldn't see the words written on it clearly. It turned out to be because there were no holes in the banner!