Rinse and dry the chicken completely. Season with salt and five-spice. Mix by hand and make sure each piece is properly coated with the seasonings.
Arrange in a baking sheet, and place in the refrigerator for at least 30 minutes.
Preheat the oven to 245-degree C.
Take the chicken out of the refrigerator and rub with the vegetable oil. It should only be like a gloss to the chicken, NOT dripping with vegetable oil.
Place a rack on top of the baking sheet and arrange the chicken pieces on the rack. Make sure that each piece is properly laid out, no overlapping.
Cook in the oven for 20 minutes. Turn the chicken to brown the other side and put back in the oven for 25 more minutes.
Take the chicken wings out of the oven and place them in plate. Serve right away.