• An earlier version of this article incorrectly reported that David Wong-Tung was a director of Oravida. He is, in fact, a director of Oravida NZ Ltd and had no cause to be aware of the product promotion in China, or any responsibility for it. We apologise to Mr Wong-Tung.
Prime Minister John Key says his office will write again to Oravida asking it to stop using his photo in its promotional material.
He told reporters that the company was in breach of the Cabinet Manual by using his image in material at a seafood show in China, months after using MP Judith Collins' photo in another product endorsement.
He said many other companies also used his image without permission, and his office wrote to all of them asking them to stop.
"The Cabinet Manual is quite clear about my image being used to promote a particular product. We make it clear to companies that they can't do that," he said.