Artificial generation of negative ions requires a negative ion generator, which generates negative ions and then releases them into the air through a releaser. The book Environmental Health and Negative Oxygen Ions written by Professor Lin Jinming, a doctor in Tsinghua University, defines that air negative ions can be divided into large, medium and small ions according to their mobility, and only small ions or small ion groups can enter the living body. Small negative oxygen ions or small negative oxygen ion groups have good biological activity. Small ions are small particle size negative ions, which are equivalent to air negative ions in nature. Some data call them ecological negative ions, which have the characteristics of long migration distance and high activity. At present, only by adopting the world-leading ecological negative ion generation chip technology and nano-fullerene negative ion releaser technology can we generate ecological small particle negative ions equivalent to nature.