I think that Hue meant the opposite, i.e. Chinese living in Malaysia, as they make for about 1/3 if the population there. So I would say "chugoku no mareeshia-jin". Can you say "chuugokukei mareeshia-jin" 窶吮??ツ坂?佛地 ニ筑ニ椎陳ーニ歎ニ但ツ人 ?
I would call chinese people in Southeast Asia "窶ーテ倪?ケツ。(Kakyou)".
If you want to specify the country, I would say "窶吮??ツ坂?佛地ツ≫?コツ≫?コツ人",
like Maciamo-san said.