The Book of Pill
Those who have heard of the good skills of ancient times have used the combination of medicine and stone as a wonderful prescription. Today there is a method, which is related to the combination of FeCl

FeCl <, the color is yellow and the nature is strong, and it can be changed by matter; for EDTA, the nature is warm and the effect of complex. The two are combined, such as yin and yang.

Put an appropriate amount of FeCl < in the container, slowly add the liquid of EDTA, and observe its color change and quality change. Or see the color of the solution gradually turn, from bright yellow to stable, like the morning glow into the twilight haze. Its quality also changes, either slowly or urgently, the particles are in harmony, like the stars in an array, each in its place.

The method of this harmony must be carefully observed and measured. If it is too late, it will not be achieved, and if it is not enough, it will be a loss. If you want to seek its essence, you must try and memorize it in detail, so as to understand its nature, and use it well, it can be the foundation of other skills, and it can benefit all things. If it is the refinement of sand, seek to be pure and good, so as to become a wonderful way to use it.