Why is the dragon a dragon constellation in saints? It is strange that the western constellation system uses China fantasy creatures as constellations.

This is a Japanese cartoon. The image of the dragon is designed according to the traditional Japanese dragon, which has been handed down from ancient China. This setting is very common. Besides saint seiya, the dragon in the Dragon Ball is also the dragon of the East. Well, compared with the Oriental Zodiac, it's a bit strange for the Western Zodiac to use the Oriental Dragon, but it can spread East Asian culture. As the birthplace and subject of East Asian culture, China should be affirmed.