The transportation stage mainly considers the transportation of feed, and the transportation mode is mainly road transportation. The damage caused to the surrounding environment of the road during the transportation process, the feed loss generated during the transportation process and other service costs (such as: high-speed fees, refueling fees, repair costs, etc.) are not considered, and only the exhaust emission during the vehicle transportation process is considered. Data users should note that this data set only includes the emissions from vehicle exhaust during transportation of feed and excludes any other environmental impacts or costs such as damage to roads, feed losses, or service costs. Care should be taken when applying this data in environmental impact assessments to ensure proper boundaries are set and that other significant life cycle stages, such as feed production and end-of-life, are also considered.