If you are in China, you'd better take TOEFL in there. However, you can take TOEFL CBT in here at any time you want, not like in China, every year have four times. CBT is difficult than Paper in listening. If your english is good enough, it is easy to get 580 in CBT is 237. Remember, english vocabulary and listening is the big problem for Chinese. Work hard on that, you will be fine.