If you really want to whiten, you might as well make a gentle whitening mask (strawberry yogurt \ milk \ rose moisturizing, etc. If you are worried about being too expensive, you can also buy some compressed masks and soak your face with pure milk, which is not bad.
But the most important thing is to maintain, drink more water, eat less soy sauce, potatoes and eat more fruits. You'd better wear a hat when you go out, apply sunscreen, apply sunscreen in time, and wash it off when you come back.
Then, have a good rest every day ~