First of all, it is necessary to make clear whether the goal of study is to pass the IELTS test of CET-4 and CET-6 or to reach the level of communication and application. In my personal opinion, learning English should not be a public welfare exam. You should accumulate more in peacetime to improve your English literacy.
Point 1 is to make good use of fragmentation time, for example, it can be used for listening. Usually, you can pay attention to some official WeChat accounts or download some listening apps on your mobile phone. Instead of playing with mobile phones, it is better to learn to improve yourself. Yes, I do. Many serious children who recite words on the subway, and even some adults learn English after work, so I personally think it is necessary to stick to it.
Because English is a process that needs long-term accumulation, just like we learn Chinese, we have to learn it from primary school to university, and there are also college Chinese courses. There are even specialized English, Chinese language and literature, and various languages and literature, so this is a long-term and continuous accumulation process.
The second is to immerse yourself in the English learning environment, including watching more American and English dramas and watching more TED talks.
Then when it comes to this part of the exercise, the most important thing is to do real questions every day if you take the exam, especially because I think you should read them every day. If you read, you can do real questions, or you can read The Economist and The China Journal, the English version of China Journal.
I think the best thing about listening is to repeat after reading, which is called shadow in simultaneous interpretation, that is, shadow following. Pro-test is very effective in improving English.
Then it is better to have a writer and translator. Long-term persistence and practice can accumulate good expressions. After writing, you can find classmates to correct each other, but it is best to find a teacher to help you correct it, and it will improve quickly. Or at least find a classmate whose English level is higher than yours.