Fairy tale is a unique cultural phenomenon, which reflects the national characteristics of each nation. Different nationalities have quite representative fairy tales. In Asia, the most famous fairy tale symbol is the dragon. The origin of dragons is generally considered to be the evolution of tribal totems. In the process of constant fighting, a tribe picked up a feature from the tribal totem that failed in its own hands, forming today's dragon totem. Modern human cognition of dragons generally comes from archaeological sites and myths and legends. In the legend about dragons, there are two kinds of animals that can become dragons: carp and snakes. These two animals have completely different ways of transforming dragons in mythology, and there is no similarity in the process.

In feudal society, it means that the children of poor families become officials through scientific research, so as to change the threshold and shine. But in mythology, fish leaping over the dragon gate refers to the way carp fish become dragons. At some time of the year, there will be a Longmen in the upper reaches of the Yellow River. As long as carp can jump over the dragon gate, it can become a dragon, call the wind and rain, and become an immortal at one time. In this myth, carp and fish only need to cross the dragon gate, without other extra costs, and the time is relatively fixed and the process is shorter.

In all the myths in China, snake dragons must be cultivated. And this process is quite long. Every 500 years, snakes will enter a level. At first, it will be a dragon. At this stage, the snake has become a dragon but has no horns. In another thousand years, the snake's horns will become dragons. In this myth, the process from snake to dragon is very long and easy to repeat. Compared with the previous jumping dragon, it is more difficult to turn a snake into a dragon, and you need to accumulate your own virtue in the process of turning a snake into a dragon. Once what is violated? Heaven? It will immediately return to its original shape.

The value system of fairy tales is in an age without scientific thought. At that time, people will use their own value system to create a reasonable value structure, which is very easy to internalize into national culture and national characteristics in the process of continuous inheritance. Dragon is our unique national totem, and its evolution process is also the process of continuous integration of Chinese culture. However, such myths and legends have undoubtedly enriched our mythological story system, which has a certain influence on enriching the mythological system of the Chinese nation, and also allowed us to have a deeper exploration of historical thinking.