... I think OP has confused 'ethnicity' with 'race'. Ethnic groups are defined by a particular language (hence why you have ethnic Russians in former Soviet-bloc countries who identify more with being Russian than say, Latvian, Estonian or Ukrainian etc.), specific geographic origin (e.g. the dozens of different ethnic groups in China), traditions and religion (sorry, no example there). Races are typically defined by genetic markers that have discrete phenotypes.
Thus, I'm ethnically Yue, but racially Sino.
Anyway, in both cases: no. It's the eyes... *shrug* though to be fair, Zhao Wei is a very attractive woman and if she walked up to me and (in Cantonese... ¬_¬) wanted to *insert m/f associated activity here* I'd say yes without a second thought.
However, all my girlfriends have been Caucasian (one Brit, one Mediterranean and one German) even though I have been attracted to a fair few Indian subcontinental people.
Not sure what that says about me...