As for why I found my face turned black after using water and lotion, the reason is very simple. Just finished washing my face, my face is very moist and full of water. When there is enough water, the refracted light is bright. But when we use emulsion, the refracted light will be darker after eating oil, so it looks black again. This is why our skin looks dull in the afternoon, because it has arrived. In the afternoon, the skin secretes more oil, so the cycle of skin keratin metabolism is 28 days, so you can't rush to get any whitening products. It will take at least 28 days to see the initial effect. Just turn off the lights when you sleep at night. Don't exaggerate sleeping with your head covered. Just pay attention to sun protection during the day.