I20上面写的是6年PHD, 半奖，每年的生活费是1万多。在美国呆了一年了。这次回去不知道要开多少的钱才合适呢？

谢谢大家！

I assume you have 50% RA/TA. Then the bankstatment is not needed (That is for F2 and new F1 only).

If you are continuous student, go to your depat or international office, let them give u a "good standing letter", which will tell whether you have RA or TA, how much it is. With this, it is very enough.