English writing is very important for Chinese students since it is a crucial part of many tests, such as the College Entrance Examination for high school students in China, College English Tests (CET), and the Unified National Graduate Entrance Examination. Some students frequently employ writing strategies such as memorizing sample phrases, sentences, or essay templates to cope with exams. Some studies confirmed that there is a certain relationship between students’ use of writing strategies and their writing performance. There are some high-performing students who usually can not only express certain content in a coherent structure but can also organize the sentences well with little to no grammatical mistakes when writing in English. The participants of this case study are undergraduate students who are high-performing writers and English majors. They completed two writing tasks, followed the think-aloud protocol, and joined the semi-structured interview. Results determined the strategies of the participants, such as meta-cognitive, cognitive, rhetorical, and affective/social strategies. Findings have important implications for teaching and learning writing.