It's true. Professor Chen Jingzao has long been engaged in physiotherapy, recuperation and preventive medicine. His national key book "Modern Physiotherapy" has done a lot of research and writings on air ion therapy. The treatment of cardiovascular and cerebrovascular system, nervous system, respiratory system and cancer by negative ions is expounded, and the important role of small particle size negative ions in treating diseases is also mentioned. At present, due to the limitation of technology, not all negative ions can achieve the effect of recuperation and health care. The ecological negative ions generated by using the technology of ecological negative ion generation chip can play an important role in treating diseases.