CTL, it’s not a mitzvah to get offended. There is no documentation as to the origin of the term, only theories. One theory I read is that the term “Chinese” was chosen to give the impression that the event would be exotic. Another theory is that they used to serve Chinese food at these auctions. Another theory is that originally the prizes were beautiful Noritake and Mikasa sets. I’ll make up some more if you want.
People find dinner time calls offensive. You should run your list through the DNC list even if it’s not legally mandated.