Used by Taoist masters for thousands of years, the Greater Kan and Li formulas are for advanced students of Taoist Inner Alchemy and mark the beginning of the path to immortality. The exercises include how to harness the energies of Sun, Moon, Earth, North Star, and Big Dipper; how to reverse yin and yang power at the solar plexus; and how to connect astral energy with the energies of animals, children, and plants to grow the immortal fetus.