This study adopted a longitudinal retrospective case study approach to investigate Chinese business students' transitional learning experience in a problem-based learning (PBL) course with innovative assessment practices. The study focused on students' beliefs and strategy use in a constructively aligned PBL course for business communication. Eight students who had made notable progress were chosen for retrospective analysis. The data included 48 journal entries, interviews, and writing samples collected at different stages of the course. This study identified taxonomies of participants' beliefs about learning and writing, their perceptions of assessment, and their strategy use for learning. It also examined changes in beliefs, perceptions, and strategy use to determine the nature of the students' learning experience in this PBL course. Findings suggest a recognised need to design PBL courses that align social constructivist learning principles with students' beliefs and strategies. The results also highlight the importance of developing appropriate assessment rubrics to enhance student engagement with PBL learning for improved outcomes.