Firefly takes place in a universe where Chinese and American cultures have fused, as evidenced by Chinese signage, and the frequent use of spoken Chinese in the series. Yet, for a universe that's supposedly half Chinese, there are exceedingly few appearances by people of Asian descent in the show.
I believe that out of universe, this can be attributed to deep-seated cultural and racial issues in the film and television industry.
I'm interested to know, however: is there an explanation in universe as to why a half-Chinese culture is so darned white?