First , you should know why you want to learn English. If you just want to pass exam, then you need to buy some related books, remember words and complete real papers. If you want to hunt for a job related English, then you should know what kind of job you want, and learn someting related to it. For example, if you want to be a translator, you should learn two languages well ,and know how to translate between them. But if you want to do something related business, then you'd better learn business English. Anyway, whatever English you want to learn, the basic thing is to remeber words and understand grammar. So it's necessary to take much time to read, write and remeber. I suggest that you can learn 'New Concept English', it's a good textbook for Chinese people to learn English.