This Chapter details a Taoist alchemical practice called "Golden Liquid Returning the Elixir" and "Refining the Form." It describes the process of manipulating internal energies, visualized as the interplay of sun and moon, heart and kidney Qi, and gold and jade liquids, to achieve physical and spiritual transformation. The practice involves specific breathing techniques, visualizations, and seasonal adjustments, aiming to achieve immortality through the refinement of the body's energies. The text includes instructions, invocations, and descriptions of expected physical and spiritual changes. Ultimately, mastery of this practice promises enhanced vitality, enlightenment, and a state of harmony with the Dao.