When I was in Vietnam, many decades ago, I met quite a few ethnic Chinese, in (by Physical area) a very large China town, the Cho Lon district of Saigon. There was a nice Army PX we used to go to, even though we were USAF, at Bien Hoa.
What life experience you have.
Many of the “boat people” from Vietnam were Chinese. One of my sisters in law, for example.