1. many electromagnetic waves (one kind of qi) can make the human body gradually senile, thus causing many diseases, through the crystal can absorb those harmful evil spirits, reflect out
2.the solid form of crystal, it has the function of regulating sleep and relieving fatigue to the human body
3.under high temperature, crystal radiates far-infrared, negative ions, etc. . When heated, it releases 90% far-infrared. When the Crystal Board is put on the fire, the Crystal Board feels cool, the feel of the board is hot, this is the role of far infrared
