https://chinese.scottrade.com/frame_w8.asp

1. 什麼人可以開設國際帳戶？
Am I qualified to open an international brokerage account?

如果您沒有社會安全號碼，也不是美國的公民或永久居民，應具備申請資格。（目前開放大陸、台灣、香港地區居民，其它國家可能於近期加入。）
You are eligible to open an international brokerage account if you are not a U.S. citizen or permanent resident, and do not have a Social Security number. At present, international account is only available for residents of China, Taiwan and Hong Kong only. Additional countries may be available soon.