"Kung flu", and then defending Trump saying "Kung flu" like it's not racist, doesn't help.
Chinese Americans were majority Democrat pre Trump. "Kung flu" was essentially the Devil outraging the choir. I doubt anybody who voted for Trump changed his or her vote because it.
Two factors are 1) low income Chinese immigrants voting Democrat due to dependence on social welfare programs and 2) second generation or beyond Chinese Americans assimilating overclass liberal views due to largely attending blue metro public schools followed by universities.