A kind of fireworks I played when I was a child. Our dialect here is called Qihuazi. Do any friends know? What is its scientific name?

The scientific name of this kind of fireworks you mentioned should be "flower spraying". My hometown is Shandong, so we call it. This kind of fireworks won't ring or fly to the sky, but it just keeps spraying on the ground. You think it's down there? If so, the scientific name is "flower spraying"