The concept of immortality in Taoist Alchemy is not a literal physical immortality, but rather an inner transformation that leads to a state of eternal existence or spiritual immortality. This inner transformation is achieved through the practice of alchemy, which involves the refinement and cultivation of one's inner energy or "qi."

In Taoist belief, the body is seen as a microcosm of the universe, and just as the universe is constantly changing and transforming, so too is the human body. Through the practice of alchemy, Taoists seek to harmonize and balance the energies within the body, allowing for a state of perfect health and longevity.

One of the key principles of Taoist Alchemy is the cultivation of the "Three Treasures" - Jing, Qi, and Shen. Jing refers to the physical essence of the body, Qi is the vital energy that flows through the body, and Shen is the spiritual essence or consciousness. By balancing and refining these three treasures, Taoists believe that one can achieve a state of immortality.

Through the practice of meditation, breathing exercises, and other techniques, Taoist alchemists aim to purify and refine their Jing, Qi, and Shen. This process involves letting go of negative emotions and desires, and cultivating virtues such as compassion, patience, and wisdom. As one's inner energy becomes more refined and balanced, it is believed that the body becomes stronger and healthier, and the mind becomes clearer and more focused.

In Taoist alchemy, there is also a focus on the physical body and its connection to the natural world. Taoists believe that by aligning oneself with the rhythms of nature and living in harmony with the environment, one can achieve a state of balance and longevity. This is why practices such as qigong and tai chi, which involve slow and mindful movements, are often incorporated into Taoist alchemy.

Ultimately, the concept of immortality in Taoist alchemy is about achieving a state of inner transformation and harmony, rather than a physical immortality. It is a journey towards spiritual enlightenment and eternal existence, rather than a quest for eternal physical life. Through the cultivation of one's inner energy and the alignment with the natural world, Taoist alchemists seek to transcend the limitations of the physical body and achieve a state of immortality.