It is said that Nian is a small animal with a head of ten feet long, eyes like copper bells, coming and going like the wind, and the sound of "Nian" is emitted when it calls, so it is called Nian animal.
Over time, people gradually found that Nian beast was afraid of three things, namely red, fire and loud noise; so later people would gather together on New Year's Eve when the animal would come, stick red paper (later gradually changed to peach stickers or red couplets), hang red lanterns, set off firecrackers and so on, in order to drive away Nian beast.
When the animals were driven away, people would always say happily to each other, "Another year has passed." Slowly, there is the saying of New Year's Day, and thus the custom of New Year's Day appears.