If you want to take the exam, I suggest going to school every day. It takes about 2200 words to pass Band 4, and you can study for 250 hours.
The study focuses on grammar and the national conditions of Germany, as well as the language used.
Non-professional German CET-4 has four parts: listening (15), reading (45), grammar and vocabulary (25) and composition (15).
Because there is only a written test, if you want to pass quickly, I suggest you recite words, read them after listening, buy grammar books, when you want to buy several sets of questions, what to do, answer the questions in 20 classic papers, and learn at least a little sense of language every day. In fact, in the last four years of English, if you can casually summarize what kind of article titles this word often appears in. Because China's teacher has a problem, your article is not worried about the gorgeous sentences behind the logic.
Special ideas, and then try to believe that non-professional four is not difficult, come on.