I don't think he is Chinese. Definitely Asian. He has a lot of Native American blood. Who migrated from Asia. He has the epicanthic fold. http://en.wikipedia.org/wiki/Asian_eyes
Chino is a common nickname in Latin America given to individuals with slanted eyes, it doesn't necessarily mean they're actually of Chinese descent. Mexican Jesus Chong, who briefly held the light flyweight title in the late 90s is probably the most accomplished Latino fighter with Asian ancestry.
so, you think any other asian fighter in history could have done what maidana did against ortiz, soto-karrass and broner?
jeez...look at the latinos tryna claim an asian fighter just like they tried to claim pacman. Have some pride for chrissakes. EVERYBODY knows the reason he's called CHINO is because he's of asian descent. He's not the only one...i know koreans who come from argentina too.
You know Maidana isnt asian cause Duckweather is fighting him.... twice. If Maidana was asian he would be avoided like the other asian fighters Duckweather has avoided his entire career.