I guess it's only you and I my dear xinranliu. Nice work! I like the change in warmth of the skin from warmer at the light, to cooler in shadow. I also like how you've managed to get a very shiny (!!!!!) surface with minimal brushstrokes. Only thing that is really bugging me is that spot over his left (our right) shoulder where there's a lighter spot. Just changing the value to be a bit darker there work work I think.