There are similarbeauty products on the market such as negative ion beauty instrument. The method ofgenerating negative ions is roughly through the ultrasonic negative ion atomizationtechnology, which converts water into mist and releases an amount of negativeions. No matter in what ways we produce artificial anion, the chemicalcomposition is different. However, Proyons NIC2550 negative ion generation methodis different, using the ultra-fine powder of tourmaline, which belongs to thecrust rock, it can release natural negative ions. Therefore, the negative ionslike some caves are also relatively high. For example, the negative ions ofBaima Cave in Guangxi Bama can reach about 100,000 per cubic centimeter.