This Chapter details a Daoist internal alchemy practice called "Flying Golden Essence from the Elbows," aiming for immortality. The practice involves aligning bodily energy with cosmic cycles—the Sun and Moon's movements—over 300 days, divided into three phases. It uses visualizations and specific postures to cultivate internal energy ("Qi") and create an "internal elixir." Success is marked by improved health, vitality, and longevity, reflecting a harmony between the microcosm (human body) and macrocosm (universe). The text provides detailed instructions, timing guidelines, and metaphorical explanations rooted in Daoist cosmology and numerology.