Prime Minister John Key will visit China later this month to try to lay to rest any ongoing concerns after last year's false Fonterra contamination scare.

Mr Key has announced he will travel to China and Hong Kong before travelling on to The Hague in the Netherlands.

The visit to The Hague is for the third meeting of US President Barack Obama's Nuclear Security Summit - a summit likely to take on increased importance because of the unrest in Ukraine.

In China Mr Key will meet with both President Xi Jinping and Premier Li Keqiang.

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"My visit provides an opportunity to brief China's leaders on the outcomes of the Government Inquiry into the Whey Protein Contamination Incident. I will be able to report to China's political leadership, and assure Chinese consumers that the inquiry delivered a strong endorsement of the New Zealand food safety system."

Mr Key said he will undertake tourism events in Hong Kong, and hoped to have bilateral meetings with other leaders while at the Nuclear Security Summit.