Funtion 1. Health care and disease prevention anti-change 2.promoting blood circulation to remove the blood status and producing new blood 3.balance Yin-Yang so as to prevent and treat diseases and conserve health 4.relaxing muscles and tendons and revoing obstructionform meridians 5. adjusting the biological information of arrhythmias, so as to play a role for adjustment of the diseased organ 6.Excluding the Toxin of body How to use the gua sha board? 1. guasha oil should be smeared before using 2. when scraping,the gua sha tools appears to human skin at 60 or 90 degree angle 3. then the treatments site as the center and the outer periphery try to expand its scope!