<p>This study investigates the multidimensional nature of piano accompaniment in collaborative music making, focusing on musicians lived experiences, multidirectional information flow, communication strategies, and their cultural implications. While prior research has often examined technical and pedagogical aspects of accompaniment separately, limited attention has been given to how these dimensions intersect in practice, particularly within hybrid cultural contexts such as contemporary China. To address this gap, a qualitative research design was adopted. Data were collected through in-depth semi-structured interviews with 21 participants, including professional piano accompanists, music educators, and music students from different regions of China. The interview data were systematically analyzed using qualitative analysis software to identify recurring patterns and strategies related to technical execution, emotional coordination, and cultural negotiation in accompaniment practice. The findings reveal four interrelated themes that characterize the experience of collaborative accompaniment. First, accompaniment is experienced as a relational and adaptive process, shaped by emotional resonance and sensitivity to interpersonal dynamics. Second, the quality of information accessed during preparation and performance whether derived from digital resources or human mentorship plays a decisive role in rehearsal efficiency and performance outcomes. Third, effective communication emerges through a dynamic interplay of verbal cues and spontaneous gestural interaction rather than through verbal instruction alone. Finally, cross-cultural literacy is shown to be essential for achieving artistic coherence, particularly in educational and performance contexts that integrate Western art music with traditional Chinese musical practices. By integrating perspectives from collaboration, information quality, and cultural-historical activity frameworks, this study conceptualizes piano accompaniment as a multifaceted practice that is simultaneously technical, communicative, and cultural. The findings offer practical and theoretical insights for music education and professional training, highlighting communication fluency and cultural competence as core skills in collaborative performance settings.</p>