I wish I'd started taking dragon pictures earlier, but here are two from my last day in Xi'an.
The first is in the Shaanxi History Museum and is from the Tang Dynasty (AD 618 - AD 907):
This one is on a street lamppost:
According to Wikipedia, there are examples of Chinese dragons dating back to 1600BC.
A rec from some Temeraire fanfic reading I did while I was away: Sixteen by quigonejinn, a very short (900 word) story about the first harnessing of Longwings.
The final Temeraire book is apparently still being written and no release date has been set.