Drawing heavily from the disciplines of kung fu, qi gong, and nei gong, this article focuses on cultivating the lower dan tian—the "elixir field"—as a vital reservoir of qi that fosters deep immunity and what the author terms "spontaneous flexibility" or psychological resilience. The dan tian is the container of infinite potential that allows patients to feel less helpless and more active co-creators of their lives. The qi gong practice of collecting the qi into the lower dan tian at the end of a session is crucial for building deep vitality, often resulting in deeper sleep and less sickness during colder months. Based on decades of clinical practice, the author developed an extremely effective three-point acupuncture formula to circulate and consolidate qi into this reservoir: Du 20 + Ren 4 + Kid 1. This formula is philosophically inspired by the concept of qi from the Earth mixing with the qi of Heaven within the lower dan tian. Functionally, Du 20 calms the spirit and benefits the brain, Ren 4 fortifies the original qi and nourishes essence, and Kid 1 is essential for descending excess qi into the Cinnabar Field. Clinically, this combination has proven highly effective for strengthening deep immunity, enhancing psychological resilience, and improving quality of sleep, supporting a calmer nervous system response.