The role of negative ions in human health care has long been proved by medical research. The State Administration of Medical Supplies, the authoritative official management organization of the country, has approved a number of air negative ion health machines, and Zhongke, the highest scientific research institution in China, has also developed negative ion instruments. I understand that ecological negative ions are better. Ecological negative ions are small particle negative ions. Medical proof shows that only small particles of negative ions can easily pass through the blood-brain barrier of human body and play the role of negative ions in medical care. At present, only Jinan Huo Xin Electric Appliance Co., Ltd., a subsidiary of Ai Ou Smith in the United States, has this technology (ecological negative oxygen ion generator based on Senpeptide).