... is unclearFolium Artemisiae Argyi can create a effective and convenient infrared ray(Wave length:0.8u—5.6u)when firing,namely,have ... fires.By physical principle,the wavelength of near infrared is shorter than far infrared’s,and its energy is stronger,it is ... only creates heat radiation through far infrared ray(wavelength:4u—15u)when firing,when the far-infrared irradiates body’s skin,it is ...