National leader Christopher Luxon has criticised Winston Peters for comments he made to Green MP Lawrence Xu-Nan during a debate in Parliament on Wednesday.

Peters told Xu-Nan, who was born in China and moved to New Zealand as a child in 1994, to "go back to where you've come from, you loudmouth." He also said: "This is called a democracy, unlike what you're used to," and accused China of lying "like a flatfish" (RNZ).

Luxon did not make his criticism in person. It came through a spokesperson from his National Party, after reporters asked for comment. There is no statement about it on the Prime Minister's official website, where government leaders normally publish formal responses (beehive.govt.nz).

In the statement, Luxon said: "Winston Peters has a long track record of inappropriate attention-seeking comments designed to get the media and other politicians to talk about him instead of the issues Kiwis are facing. This is another example of that." He also said: "To our Kiwi-Chinese community, National and I back you, and to every New Zealander who wants representatives focused on the issues that matter to you, rather than attention-seeking for cheap headlines, Party Vote National" (RNZ).

People outside Parliament also responded. Former Prime Minister Helen Clark posted on the social media site X, calling Peters' comments a "dangerous way" to talk about New Zealand's biggest trading partner, China. China's Ambassador to New Zealand, Wang Xiaolong, also posted on X, saying: "We have absolutely no interest in being dragged into the domestic politics of other countries" (RNZ).

Peters did not back down. He replied to the ambassador on social media, calling the reaction "pearl clutching and faux outrage" and saying the ambassador's comment proved his point. He finished with: "If that offends the pearl clutchers and the communist shills labelling it as dangerous — welcome to New Zealand" (RNZ).

Xu-Nan spoke about it on TVNZ's Breakfast show on Thursday. He called Peters' comments a "desperate attempt to distract" from the coalition government's record. He said Luxon should "step up and hold his ministers accountable for their behavioural patterns" (RNZ).

The key thing to understand is that Peters is not just any MP. He is a senior minister in the coalition government and holds the Foreign Affairs portfolio, which means his public comments about China carry real diplomatic weight. The Chinese ambassador choosing to respond publicly, instead of through private diplomatic channels, is a sign that Beijing was paying attention.

The way Luxon responded also matters. He criticised Peters through a party spokesperson, not by holding a press conference, doing an interview, or posting on social media himself. The statement ends with "Party Vote National," which is an election slogan. That means Luxon was speaking as National Party leader, not as Prime Minister, even though the issue is about the behaviour of one of his own government ministers.

Telling someone to "go back to where you've come from" has a long history of being used as a racial insult, particularly against immigrants. Xu-Nan has lived in New Zealand since he was a child. Peters pairing that phrase with "unlike what you're used to" — a clear reference to China's political system — makes it hard to read the comments as anything other than a pointed reference to Xu-Nan's country of birth.

Helen Clark's involvement also lifts this above the usual back-and-forth of Parliament. Former prime ministers rarely comment on individual parliamentary debates. By calling Peters' comments "dangerous" because of New Zealand's trade relationship with China, she shifted the conversation from how MPs behave to potential real-world consequences for the country.

Peters has doubled down rather than apologised, and there is no public sign that he faces any consequences from within the coalition. The question Xu-Nan asked on Breakfast — whether Luxon will "hold his ministers accountable" — is now sitting with a Prime Minister who has so far only responded through a party channel.