Eat a VC after breakfast and lunch, and a VE after dinner.

If time permits, make your own mask: use pearl powder +VE in the morning and milk +VE in the evening, which will soon turn white. The most important thing is to remember to protect yourself from the sun when you go out, otherwise whitening is useless. By the way, you can't bask in the sun when making VE mask, otherwise it will be darker.