On June 4, 1990 (May 12 of the Lunar Calendar), the United States for the first time implemented euthanasia. American Jenner for suffering from premature dementia, on June 4, 1990 using "suicide machine" ended his life. The inventor of the suicide machine was Dr. Kiev Jian. In the United States about "euthanasia", there is still no authoritative definition, generally referred to as "death of obedience", or "helpful death" or "helpful killing" etc. Our scholars have defined it as the "patient with untreatable disease is at risk of death, due to extreme pain of mind and body, at the request of patients and their relatives, approved by doctors, as a method to make patients pass through stages of death in a painless state."