2) Jade contains many minerals needed by human body. Calcium (Ca), magnesium (Mg) and other components, of which 40% magnesium is one of the main components that form chlorophyll. With the fluctuation of jade, human cells produce * * * sound and * * * vibration, which makes human cells more energetic, promotes blood circulation, enhances metabolism, and discharges wastes in the body in time, thus achieving the purpose of health care. In addition, the theory of TCM health preservation holds that people can get good sleep effect by "warming their feet and cooling their heads" during sleep.