This Chapter details a Taoist alchemical practice, "Jade Liquid Returning the Elixir," aiming for physical and spiritual transformation. The process involves a 300-day regimen of internal alchemy, focusing on cultivating and refining Qi ("vital energy") through specific techniques like saliva manipulation and breathwork. Analogies to natural processes, such as the formation of gold and jade, illustrate the transformation sought. The practice culminates in the "Golden Liquid Returning the Elixir," leading to extended life, heightened senses, and the ability to heal others. Seasonal variations and specific trigrams (from the Bagua) guide the practice's timing and techniques.