This tutorial introduces skin resurfacing and whitening methods for people with color cast photos. Idea: The skin resurfacing method used by the author is very unique. Use the noise reduction filter to remove the noise in different channels, and then whiten and sharpen it appropriately. The method is very applicable.
Original picture
final effect
1. Duplicate the background layer and smooth the surface on the copy layer. Just use the filter that comes with PS to smooth the skin. Execute the Filter-Noise-Reduce Noise command.
2. If the character's skin is reddish, use the Match Color command to adjust it, Image-Adjustment-Match Color, check "Neutralize", and keep the other values as default.