Under national standard GB 23254-2009, what are the purpose and placement standards for Body Retroreflective Markings (车身反光标识) on heavy freight trucks?

1. Red and white retroreflective contour tape must be applied along the full rear and side perimeter to outline vehicle shape and enhance night visibility
2. Blue fluorescent lights must be mounted on the roof to project advertisements onto clouds
3. Green reflective decals must be applied exclusively to the fuel tank cap
4. Reflective strips are optional and only required if the truck operates in foreign countries