1. Maintain a low GI diet: eat more low-sugar foods such as pasta, sweet potatoes and potatoes, avoid excessive intake of sugar, and prevent skin saccharification, because saccharification will lead to yellow skin.

2. Do a good job in sun protection: Sun protection measures include using hard sun protection such as umbrellas, sun hats, sun protection clothes and sunglasses, and applying sunscreen. When ultraviolet rays are strong, it is necessary to take stronger sun protection measures, such as using physical sun protection or chemical sun protection.

3. Keep a good work and rest: don't stay up late, make sure to fall asleep before 1 1 p.m. at night, so that the skin can get enough time to repair.

4. Regular hair removal: Regular hair removal can make the skin look whiter visually.

5. Use whitening products: You can choose skin care products containing whitening ingredients such as nicotinamide, but pay attention to the concentration to avoid irritating the skin and causing allergies.

6. Diet adjustment: Eat more foods rich in vitamin C, anthocyanins, vitamin E and carotene, such as lemonade, black wolfberry, mulberry, rose lemon tea, etc. These foods help to remove melanin and free radicals and help whiten the skin.

7. Avoid using products that whiten quickly: especially those that may whiten by exfoliation, which may damage the skin. At the same time, understand that the skin will not turn white indefinitely, and your whitening limit is determined by genes. For example, the part of the inner thigh that has not seen the sun all the year round is your ultimate whitening limit.

Please remember that any skin care measures need persistence and patience. Everyone's skin is also unique, so the effect may vary from person to person.