This is why: "Gu, a US citizen, made her decision with input from her Chinese mother, Yan, an outspoken “Tiger Mom,” and an American father who keeps a low profile, said one of her former coaches." Mom pushed her to do it. "China-pride." But, yet, her mother came here, married a white man, and made a ridiculously gorgeous daughter (this often happens when handsome white men make daughters with beautiful Asian women).