Introduce traditional customs with attributive clauses

My name is Daming. I go to my uncle's house for the Spring Festival. This morning, I played games with my friends. I wanted to set off fireworks, but Xiaoling stopped me. I want to know why I can't set off fireworks at festivals. Xiaoling let me have a look at the picture poster. This painting claims that setting off fireworks will cause harm, such as causing fire, polluting the environment and hurting others. After reading the poster, I think it is necessary to forbid setting off fireworks.