The health-keeping mechanism of 1. jade has been confirmed by modern science. According to chemical analysis, jade contains many trace elements beneficial to human body, such as zinc, magnesium, iron, copper, selenium, chromium, manganese and cobalt. Wearing jade can make trace elements absorbed by human skin, produce special "photoelectric effect", concentrate energy storage, form "electromagnetic field" and resonate with human body, thus making various physiological functions work more harmoniously. 2.