Well Cung Le is the only Chinese star in the UFC, and you would likely need him to coach against someone who speaks the language.
Actually, the only Chinese "star" in the UFC is Zhang Tiequan. Cung Le is a Vietnamese born American. Then I think there are two more Chinese guys currently signed in the UFC, but who haven't fought there yet. Okami is Japanese (those two countries share quite some animosities against each other), Muńoz is Filipino-American.
No offense, but those guys would represent China as much as some Venezuelan or Cuban guy would represent the USA, because they are from the American continent.