I work as freight broker over 8 years and moved shipment all over the world, and cross border. If you are talking about trasnportation of food from china there is regulation since 2005 for safe trading of the international goods
The standards, adopted by the United States in 2005, require treatment of any wood structures, including pallets, used in international shipping with either heat or fumigation. Any solid wood used in a pallet is subject to these requirements.
•Fumigation is not necessary if all the lumber used in the pallet is kiln dried. No treatment is necessary if the pallet is used exclusively in the United States. Pallets made of plywood, oriented strand board or corrugated wood are exempt from fumigation requirements..
•Warmer temperatures mean shorter fumigation times. Insects in warm wood have a higher respiration rate and consume the poisons in the fumigation gases more rapidly.
.•Fumigation may be performed only by a licensed fumigator. This applies to in-house fumigation as well as commercial fumigation companies. In-house fumigation requires proper licensing of the employee or employees conducting the fumigation.
.•Follow all label instructions and regulations. Methyl bromide is the only fumigant allowed by the IPPC standards for the fumigation of wood used in shipping containers and pallets..