You seem to be concerned about the beauty of skin. Try to remember that everyone’s skin colour is different and beauty is often about being healthy and happy.
Skin color depends on your genes which are physical, stuff emotional and behavioral things or characteristics that are passed down from your parents to you when you were conceived. You can’t control your genes as they are your own human biology.
However, if you would like to make your skin look whiter or lighter, you can protect it from sunlight especially in the middle of the day when the sun is at its strongest. Wear a hat and a long sleeved shirt, and apply sunscreen to any exposed skin. If you want to use a skin product to make your skin whiter you should discuss the idea with a doctor or skin specialist, sometimes called a Dermatologist.
You can call Child Helpline Cambodia anytime for free on 1280 if you would like to receive emotional support or further information on this subject.