Look at the appearance. Check whether the color of DC freezer meets the requirements, and whether the surface is smooth,... moreLook at the appearance. Check whether the color of DC freezer meets the requirements, and whether the surface is smooth, level and free from scratches and looseness. The interior of DC freezer is required to be smooth, free of cracks and bubbles, free of scraggy, free of peculiar smell and severe color spots, etc.