Chinese national standard "Logistics term" definition of pallet (pallet) is: for container, stacking, handling and transportation of place as a horizontal platform device unit load of goods and products. As with a similar set of container loading equipment, pallet is now widely used in the production, transportation, warehousing and distribution and other areas, is considered one of the two key innovations of the 20th century the logistics industry. Tray as an important logistics process handling, storage and transportation equipment, and supporting the use of forklift trucks in modern logistics plays a huge role.