In the Spring Festival last year, Xiao Ming was very glad and he wanted to invite Xiao Hong to set off firecracker together. However, Xiao Hong was very angry to find the firecracker in Xiao Ming's handswhen he came to her. She questioned Xiao Ming why he could do this. Xiao Ming responded by the excuse of the festival. Then Hong took out a piece of newspaper, saying that if you could have read the notice you would have known that the firecracker did not only cause fire but also air pollution. It could even explode under improper deposit. Xiao Ming finally was persuaded that setting off firecracker should be restricted.