When transporting temperature-controlled dangerous goods (such as Class 5.2 Organic Peroxides requiring temperature control under JT/T 617.6), what technical configuration is required for the vehicle's refrigeration system?

1. A certified temperature-controlled insulated body with dual independent refrigeration units or a backup mechanical cooling system, continuous temperature recording, and audible/visual alarms in the cab
2. A simple open-top truck loaded with consumer ice cubes from a convenience store
3. An open sunroof to allow ambient highway breeze to cool the cargo
4. A cab heater duct redirected onto the chemical barrels to keep them dry