This paper examines the collaborative development of "Harmony between Heaven and Earth (HHE)," a guqin-based wellness program created in partnership with the Tucson Chinese Cultural Center in Southern Arizona. Addressing gaps in cultural diversity within music-and-health research, the study asks how ethnomusicologically informed, community-based approaches can be used to design music and wellness programs that meaningfully serve diasporic communities. Based on weekly stakeholder meetings as well as interviews and ongoing conversations with community members and guqin practitioners, the research documents local perspectives on wellness-oriented approaches to music learning grounded in cultural philosophy and lived experience. Over the past three decades, scholarship in medical and applied ethnomusicology has demonstrated music’s role in health and healing as a culturally situated phenomenon, often through ethnographic, collaborative, and intervention-based studies. However, comparatively less attention has been given to diasporic communities, where health values and practices may be marginalized within North American systems. I argue that culturally grounded, participatory program design—rooted in ethnomusicological engagement with community values, histories, and musical traditions—is essential for promoting wellbeing in diasporic settings. Building on existing scholarship while addressing this gap, the paper proposes an integrative framework that bridges ethnomusicology and health promotion through the collaborative design of a guqin-based wellness program situated in a cultural center. By foregrounding non-clinical notions of wellbeing, community participation, and cultural sustainability, this study contributes to applied ethnomusicology by offering a model for collaborative research that expands the field’s role within interdisciplinary Arts in Health initiatives.