https://en.wikipedia.org/wiki/List_of_Asian_Americans_and_Pacific_Islands_Americans_in_the_United_States_Congress
Not that many, and I'm not sure how it compares to the "ratio" of these ethnicities to "Anglosaxon" or whatever as a whole, but China has 4x to 5x the people (tho presumably a lot lower number of non-Han-Chinese).
Somehow tho, I just don't see China ever embracing this. Is there a reason? Or am I wrong and is it possible?
I know in HK at least there have been a few white people in government positions:
https://en.wikipedia.org/wiki/Paul_Zimmerman_(politician) - yet only a district councilor, not in LegCo
But I don't think this has happened in Taiwan or Macao, or the Mainland (at least since 1949).