Longevity Begins with the Master of weapon Refining

Moreover, heaven and earth are the furnace, and nature is the craftsman; yin and yang are charcoal, and all things are copper!
Nature and nature are the work of gods and spirits, and they follow the great principles.
The metaphysical is called Tao, and the physical is called Qi. Qi is the object of Tao, and it is entrusted to the heart.
Those who get the best will be divine and live long, those who get the middle will achieve success in Taoism, and those who get the worst will have strange skills and tricks.