In 1998, the new photorejuvenation technology began to sweep the world. This technology is highly effective in enhancing the overall condition of the face and superficial wrinkles. Photorejuvenation can also solve other skin problems, such as vascular diseases, pigmented diseases, rough texture of the skin and enlarged pores, etc. Because of its short course of treatment, convenient and quick, it has been widely popularized as soon as it was introduced. The professional name of photon should be called “Intense Pulsed Light” (IPL), which is a broad-spectrum pulsed light produced by a specific light source, and is also known as Intense Light because of the high brightness that characterizes the light it emits. It is not a laser, but it is very similar to a laser in that it is characterized by high energy, relatively concentrated wavelengths, and adjustable pulse widths. Its working principle is to limit the low wavelength output through the interception of the center filter, and the working spectral range of 550-1200 nanometers. Among them, the shorter wavelengths are preferentially selected and absorbed by the pigments in the skin and hemoglobin in the blood. Without destroying the normal skin, it can make the blood vessels coagulate and the pigment clusters or pigmented tissues destroy and decompose, so as to achieve the effect of treating capillary dilatation, rosacea, erythema, pigmented spots and freckles after skin resurfacing surgery. The longer wavelengths act on the deeper tissues of the skin to produce photothermal effects and photobiochemistry, causing the collagen fibers and elastic fibers of the skin to rearrange and restore elasticity, thus achieving the therapeutic effect of eliminating or reducing wrinkles and shrinking pores. On the basis of photon, we have developed the E-light cosmetic system, which is a technology that combines radiofrequency energy and intense light for treatment. It contains both photorejuvenation treatment items and radiofrequency treatment items, and achieves multiple treatment effects in a single treatment process.E-light technology fully combines the advantages of light energy and radiofrequency energy to complement each other, utilizes the impedance difference between target tissues and normal skin tissues caused by the selective absorption of light energy by the skin to strengthen the absorption of radiofrequency energy by target tissues under the condition of low light energy intensity, and greatly eliminates the overly strong thermal effect of light energy. The core technology of E-light has three main points: radio frequency + light energy + epidermal cooling. In E-light technology, light energy plays the role of a guide, guiding the radio frequency energy to focus on the target tissue absorption of radio frequency. At the same time, the contact cooling technology on the surface of the treatment head eliminates the thermal effect due to the excessive light energy and increases the impedance of the epidermis, reducing the absorption of radiofrequency energy by the epidermis, which greatly improves the therapeutic efficacy and safety, and is equally effective on light-colored target tissues. E light has the following aspects of cosmetic treatment: (1) E light to improve a variety of skin imperfections and skin rejuvenation: breakthrough in the traditional laser and intense pulsed light treatment, E light technology combined with radio frequency energy and laser energy, its intense pulsed light and high-frequency electromagnetic waves release energy at the same time, through the target tissues of the selective absorption of light energy to focus on the dermis of a variety of lesions in the dermal tissue, in the premise of non-invasive removal of non-invasive without damaging the normal epidermis safe! Without damaging the normal epidermis, it safely and non-invasively removes all kinds of pigmented and vascular spots on the face, and at the same time stimulates the newborn of collagen tissue and restores the skin’s elasticity, so that the facial skin can be upgraded as a whole and reappear healthy and attractive. All skin types can be effectively treated. (2) E-light for acne: E-light-based photodynamic therapy outputs blue light, red light and high-frequency electromagnetic waves, which act precisely on target tissues such as sebaceous glands and acne, using blue light to kill Propionibacterium acnes, and the combined effect of red light and high-frequency electromagnetic waves to reduce the activity of sebaceous glands, to achieve a comprehensive and effective treatment for the purpose of acne. (3) E-Light Hair Removal: Through the selective absorption of light energy by hair, E-Light Hair Removal cannot be completed in one session, but requires 2-3 sessions to remove hair completely. Because human hair is divided into anagen, resting and regression periods, only when the hair follicle is in the anagen period there will be a large number of pigment particles in the hair follicle to absorb a large amount of light energy, so the photon in the anagen period of the hair has the effect of removing, and the regression and resting period of the hair pigmentation is relatively less, so the photon treatment effect is relatively weak. For this part of the hairs need to wait until they slowly transform to the anagen phase before E light removal, so E light hair removal treatment can not be successful at once, usually need multiple consecutive irradiation to achieve the best results. (4) E-light treatment for enlarged pores: E-light technology is currently the most advanced method of treating enlarged pores. And it is very safe. Its treatment hot spot is located at 0.5-1.5 millimeters under the skin, and the sebaceous glands and pores are just located at this depth. Radiofrequency reduces the activity and secretion of the sebaceous glands to minimize acne, and a large amount of collagen is created around the pores to minimize pore size, while collagen growth improves skin tone and increases skin elasticity. After 3-5 treatments (2-3 weeks between sessions), the improvement will be dramatic. All skin types can be treated effectively. (5) E-light treatment of leg veins and vascular lesions: the laser can be selectively absorbed by hemoglobin, and then combined with high-frequency electromagnetic waves with strong penetration, effectively targeting thick and deep blood vessels, while avoiding adverse effects on the epidermis. Effective treatment of blood vessels up to 5mm in diameter, the depth of treatment is 20% to 30% deeper than the general depth of light energy, can effectively treat leg veins and vascular lesions without damaging the normal skin.