Is Chinese composition ok? If not, read more articles. It may be vague at first, but it will be easy to use after a long time. And the rest depends on your diligent recitation.

The way of thinking in English is quite different from that in Chinese. Sometimes you can think of a beautiful sentence in Chinese, but you don't know how to express it in English. This is normal. I suggest you read more books and think more. When I was in middle school, apart from expanding my vocabulary, English grammar was also very important. Being able to use a variety of grammar flexibly in composition can add a lot of points.