What does the narrator compare Hassan's face with?

I can still see Hassan up on that tree, sunlight flickering through the leaves on his almost perfectly round face, a face like a Chinese doll chiseled from hardwood: his flat, broad nose and slanting, narrow eyes like bamboo leaves, eyes that looked, depending on the light, gold, green, even sapphire I can still see his tiny low-­‐set ears and that pointed stub of a chin, a meaty appendage that looked like it was added as a mere afterthought.