Prime Minister John Key says the refusal by Chinese officials to clear containers of frozen meat being held at the border is simply because of confusion over documentation.
Mr Key told TV3's Firstline that New Zealand's ambassador to China, Carl Worker, went to see authorities yesterday and confirmed a technical issue was holding up shipments of New Zealand meat on Chinese wharves.
The ministry's recent name change from Ministry of Agriculture and Forestry to Ministry of Primary Industries, which issues export certificates, had caused confusion.
A second issue was China implementing more rigorous procedures to stop counterfeit meat, Mr Key told Firstline.
"You've got a more robust system and a different agency, and so that's what's slowing things down. We genuinely don't believe there's anything more sinister than that.