Long long ago, there is a monster called Nian living in a mountain. It plundered the food of people who lived at the bottom of the mountain every Chinese New Year. People struggled with this very hardly and felt afraid of the coming new year because of the monster. However, the monster has one weakness which people were not aware of, that is, it fears blares and other big sounds. By chance, one old man burned bamboo during the New Year, as the air inside the bamboo cavity by thermal expansion, bamboo burst, which issued a loud noise, and then the monster Nian heard the noise, it felt scared of this noise, so it ran away and then went back into the mountain. Because of this experience, people found the way to drive away the monster Nian, they just needed to burn the bamboo to make noise. After then, once Chinese new year comes, people burn bamboo to make noise to scare Nian away. As time went by, because of the emergence of gunpowder, people invented firecrackers to replace the bamboo. Year by year after that, it became a tradition in Chinese new year, and till now, you can see or hear the firecrackers or fireworks during Chinese Spring Festival.

Firecrackers are made of gunpowder and paperboard. There are three steps to make the firecrackers. The first step is to put the gunpowder into an oval hard paperboard, and then connect the gunpowder inside with a blasting fuse, and next, cover the paperboard with a red wrapping paper, and the final step is to connect every single small firecrackers together to a larger one.
However, every coin has two sides, setting off firecrackers can also bring a lot of harm to our life. For example, it causes serious air pollution and noise pollution. It also poses a great risk to firecrackers, especially for children who have poor safety awareness. Firecrackers can cause injuries, and even life-threatening. So in order to reduce the firing of firecrackers, children should be accompanied by adults when setting off firecrackers. The government now also set regulations to restrict the use of firecrackers because of the harm of them.
