I recently got to thinking about wei qi, especially as we are moving into the dark of the year in the northern hemisphere, and I realized that I hear discussions about wei qi, and how we should attend to it, or nourish it. Often enough, perhaps too often, we equate wei qi with the immune system. And think about strength, rather than balance. What’s more, the commonly used formulas that are famous for ‘stabilizing or strengthening the exterior” are frequently prescribed without any kind of actual differential diagnosis. Concerns about effectiveness and maybe even safety naturally arise.In this conversation with Ann Cecil-Sterman, Laurie Ayers and Master Wu, we bring together the perspectives of an acupuncturist, an herbalist, and a qi gong practitioner. The intention here is to see how experienced clinicians from these three  disciplines within East Asian consider the Wei and its use in clinical work. Listen in to this discussion of the Wei qi, its source, cultivation, and connections with the yang, zheng, fluids and Heart.