1, clean skin; 2, be sure to use make-up; 3, if dry skin, appropriate to put a little moisturizer; 4, apply the right amount of sunscreen. When applying sunscreen, do not ignore the neck, chin, ears these places, careful to cause uneven skin tone, into a big flower face. 5, every two hours to replenish the sunscreen dual-use powder. When available, use a spray mineral water in 15cm from the face evenly sprayed, always replenish the skin moisture, do not let it too thirsty. Wang Junzhi, Department of Dermatology, The First Hospital of Heilongjiang University of Traditional Chinese Medicine As the isolation component must penetrate into the keratin surface before it can play a long time to absorb the isolation effect, it must be mentioned in the first 30 minutes before going out to wipe it off and replenish it once before going out. Also, try to avoid going out during the strongest sunlight hours (10:00am-2:00pm) and make good use of various auxiliary products such as umbrellas, hats, long-sleeved clothes, sunglasses, etc. to jointly resist UV invasion. Do not apply sunscreen only when you are about to go out. Sunscreen, like other skin care products, takes time to be absorbed into the skin. Therefore, sunscreen should be applied 10-20 minutes before going out, and 30 minutes before going to the beach. The use of sunscreen all kinds of misconceptions Misconception one: according to the previous skin quality selection of skin care products, summer due to the different oil secretion, skin quality will change, should do another skin quality test. Myth 2: The higher the SPF value, the better the sun protection, SPF value, that is, the sun protection factor, is calculated in this way: the average yellow skin can withstand the sun for 15 minutes without being burned, then the use of SPF15 UV light supplies, there will be about 225 minutes (15 minutes × SPF15) of sun protection time. You can use SPF5-8 sunscreen for daily care, shopping and shopping, and SPF10-15 sunscreen when you go out for fun. When swimming or sunbathing use SPF 20-30 waterproof sunscreen. Myth 3: No need to use sunscreen indoors or on cloudy days. Even indoors, under the shade of a tree, UV light can still be refracted from surrounding objects. Even on cloudy days, UV light can still attack the skin. Myth four: SPF value can not be cumulative, apply two layers of SPF10 sunscreen, are only SPF10 protection. Misconception five: before going out to apply sunscreen, sunscreen and general skin care products like, need a certain amount of time to be absorbed by the skin. So 10-20 minutes before going out should be coated with sunscreen, and 30 minutes before going to the beach should be coated. Myth 6: Sunscreen can not be used before applying makeup, many sunscreens can be used against the skin.