What could I do?

I think what you need is English input. It seems that quite a lot English learners focus on the output of English, by which I mean using English as much as possible, while then seem to neglect the importance of reading and thinking. Only through reading can you find your inaccuracy and develop corresponding strategies to tackle your problem. So read as much as you can. By the way, I am also an English major in a Chinese University. May I know which university you come from?

Hello shining. If you have the intention to improve your English level, you have come to a very good website, Mylot. This is really the best one for you to practise your English. You know, when you are responding to the discussions or when you are starting your own new discussions, you are forced to think in English and what is the most important is that you are using the language. The more you are using it, the more you are learning and the greater progress you will make. I do hope that you have enough time here to practise your English as an English major at college. Happy learning English, dear shining.