Personally, I think it is good that the words used in the paper are accurate and not cumbersome, and the sentences are fluent and not lengthy. For example, using is very important and not sophisticated, but changing it to essential will make you feel different immediately. Use adverbs of degree as little as possible, such as very, really. In terms of sentences, try to avoid long sentences. If you write 3 or 4 lines without a period, you will feel dizzy.

I recommend Chinglish, a book written by foreigners, which is very thorough and thorough.