Human enhancement is the use of biomedical technology, intelligent technology, neuroscience technology, information technology, nanotechnology and other high-tech means to make healthy human body's function or ability beyond its normal range, so as to fundamentally change human body appearance, life span, personality, cognition and behavior, and have brand-new ability. And its purpose is to significantly improve the quality of human life.
According to the above definition, which of the following is not a human enhancement technology?
The doctor advised Lao Zhang to have a heart bypass operation.