How did the folk woodblock New Year pictures gradually develop and evolve?

In the process of the formation of folk festival customs, the corresponding festival decoration art came into being. First, draw a chicken at the door and a tiger at the door. During this period, everything that appears about the meaning of congratulations is titled "Year". For example, the etiquette of greeting each other is called "New Year greetings" and the paintings sold are called "New Year pictures". Folk woodblock New Year pictures are a kind of holiday custom that has gradually developed from early worship and belief in nature to ward off evil spirits and beautify the environment.