"Hey, Sabrina, are you Japanese or Chinese?" I asked. Her reply, as it seems to be for a lot of minority groups, is, "Neither, I'm Chinese-American." So, besides her American accent and a hyphenated ending on her answer to the SAT questionnaire about her ethnic background, what's the difference? In Amy Tan's enjoyable novel, The Joy Luck Club, about the relationships and experiences of four Chinese mothers and four Chinese-American daughters, I found out the answer to this question. The difference in upbringing of those women born during the first quarter of this century in China, and their daughters born in the American atmosphere of California,