I experienced the exact same thing that I do with just about any monitary asian interaction.
I get there, the guy looks at me as if I’m stupid because he believes I’m not asian. Then he tries his best to outsmart me in every way. Money/Experience etc etc, even though I’m paying him to work on my car.
Then at the end he asks me for my name and information to make an invoice… He says: “No no no… can’t be… :S Your last name is CHUNG??? That Chinese last name… nooooooooooooooo. You lie”
“Hmmmm you don’t look Chinese. I never guess”