Near Infrared (NIR) near-infrared light, commonly known as NIR milk light, is a near-infrared light technolo- gy with wave peaks concentrated at 1300nm. It is ex- tremely penetrating and can directly heat the shallow and middle layers of the dermis, stimulate the contrac- tion of collagen fibers, and promote the proliferation of collagen., making the skin as white, smooth, hydrated and plump as milk