Final answer:
The author develops the claim by providing historical and cultural evidence of dragon myths in China and throughout Asia to this day.
Step-by-step explanation:
The author develops the claim that there is a long tradition of dragon myths in China and that dragons are revered throughout Asia to this day by providing historical and cultural evidence. The author mentions that the two Chinas, the two Koreas, and Japan all have dragon myths. Additionally, the author refers to the figure of four or five thousand years, which is considered a pure invention.
Historian Wang Hui's perspective is also included, stating that the idea of a unified imperial system in China is a fantasy. The author's claim is further supported by referencing the use of dragons in Asian art and architecture, such as the Nine Dragons Screen.