Select the drumstick and copy the drumstick layer

Operate on the drumstick layer, first remove the color

and then filter library-artistic effect-plastic packaging, with parameters 2, 12 and 8. You can choose the effect by yourself, and keep enough highlights of the drumstick, but don't be too

and then adjust the color level. The purpose is to adjust the highlights. In this way, you can get the high-light position map of the chicken leg

Then Alt+Ctrl+2 (the old version is Alt+Ctrl+~) to select the high-light part, hide the chicken leg layer

to operate on the background layer, and remove the redundant selection of the shadow part, so that it looks natural

to create a new curve adjustment layer, pull the curve to the highest level, adjust the white point to adjust the high-light part to white

Finally, adjust the overall picture.