An air-conditioning refrigerant change calls for a fresh check. Before reusing an earlier conclusion, re-check the vehicle nameplate, the service equipment, and the recovery conditions, and re-approve if the source has changed. A workshop without the matching refrigerant equipment removes the basis for the earlier conclusion, so the item should go back to the previous milestone for confirmation. Type restrictions and environmental management requirements for air-conditioning refrigerant in the destination country follow local competent-authority rules, licensed-body review, and the applicable contract terms. This China vehicle procurement guide covers the basics of the handover step for air-conditioning refrigerant. Re-check against the refrigerant preparation sheet once the vehicle reaches port.