Scientific writing is related to the practice of communicating scientific knowledge. This study treats scientific writing as a social practice, taking as its premise the notion that participating in related activities such as reading, peer evaluation, and discussion would positively affect the competence of students' scientific writing, by developing their epistemic cognition regarding scientific knowledge communication and legitimation. An empirical study was conducted with twenty-two Chinese undergraduate students to test this premise. These students were majoring in chemistry and undertook a researcher-designed intervention course ("Advanced Organic Chemistry Experiment"), which embodied the integrated strategy of reading, peer evaluation, and discussion on scientific writing. Based on data pertaining to those students' performance in terms of the normativity, objectivity, and logicality of scientific writing drawn from a previous study by the current author (Deng, Kelly, & Xiao, 2019. The development of Chinese undergraduate students' competence of scientific writing in the context of advanced organic chemistry experiment course. "Chemistry Education Research and Practice," 20, 270-287), alongside data drawn from students' written texts in reading reflections and on-line discourse related to peer evaluation and discussion, this study claimed that the tasks of reading, peer evaluation, and discussion were seen gradually to lead to the development of Chinese undergraduate students' greater competence in scientific writing regarding the synthetic experiments of organic chemistry.