Under national standard GB 13392 (Marking of Vehicles for Dangerous Goods Road Transportation), what exterior markings must be mounted on a hazardous goods transport vehicle?

1. Diamond-shaped hazard class placards, orange rectangular hazard identification panels with UN numbers, and roof-mounted amber/yellow flashing warning lamps
2. A plain handwritten cardboard sign placed on the front windshield
3. Green environmental friendly vehicle logos and a commercial advertising banner
4. Red decorative ribbons tied around the side rearview mirrors