Trust me, I understand what you are going through. I am an international student too but I did my bachelors from USA. GRE verbal/AWA can be really hard if English is not first language. The top econ programs in USA tend to put more emphasis on GRE Quant. and you have a perfect score in Quant. Good luck on your TOEFL. Don't stress too much about it though. USA schools use TOEFL to determine your fluency in English. Your TOEFL score should not affect your admission decision unless and until you have an extremely low score. You got 490 in Verbal, so you should be able to get a decent score in TOEFL as well. I have a lot of Chinese friends and I hear it from them all the time how hard it is to maintain a good GPA in a Chinese University. So considering that, you have a very good GPA. All the best
