Purpose: This study explores the achievements and process of a group of Chinese primary school teachers learning from a research-based school-university collaborative project. Design/Approach/Methods: We used qualitative methods to construct our research design, collecting data through participatory observations of weekly meetings, teacher interviews, and participants' reflective journals. Both thematic analysis and discursive analysis were employed as strategies to scrutinize the data. Findings: We categorize teachers' learning into five achievements--outcome, processual, democratic, catalytic, and dialogic achievement. A further examination highlights seven successive learning actions composing an implicit mechanism to facilitate these achievements: questioning, analyzing, modeling, examining, implementing, reflecting, and consolidating. Originality/Value: Through this longitudinal study, we more comprehensively record details about teachers' learning as they conduct their own research. Although school-university heterogeneous collaboration has potential conflicts, teachers can improve their problem-solving and knowledge creation and sharing abilities, promoting a sense of professional accomplishment. These findings also suggest the need to reconsider the authentic process of teacher research, a task equally significant for international educators.