Beijing has lodged an official protest with New Zealand’s Foreign Ministry over controversial remarks made by the country’s top diplomat, Winston Peters, to a Chinese-born MP during a heated parliamentary exchange.

The Chinese Embassy in Wellington made the announcement on Thursday, a day after the event, citing “negative China-related remarks.”

On Wednesday, during debate on the country’s handling of the Covid-19 pandemic, Peters, founder and leader of the right-wing populist NZ First party, was asked by China-born Green Party MP Lawrence Xu-Nan whether he had been vaccinated.

In response, Peters alleged that the lawmaker, who was born in the Chinese city of Tianjin but grew up in New Zealand, had “come here five minutes ago.”

“Go back to your own country. That's where they lie like a flatfish, but they don't lie like that here,” Peters said. “This is called a democracy, unlike what you’re used to. Go back to where you’ve come from, you loudmouth.”

The incident also prompted a rare public intervention by China’s ambassador to New Zealand, Wang Xiaolong, who said on X that while he generally avoided commenting on domestic politics, “sometimes, a statement says more about the person that makes it than anything or anybody else.”

On the ambassador's comments, Peters said that his remarks were a defense of democracy and free speech. In a post on X, he argued that the envoy had “proven the point” he made in parliament, contrasting New Zealand’s democratic freedoms with what he described as “communist and dictatorship countries.” Peters added that he would “not resile from that point.”

New Zealand Prime Minister Christopher Luxon, whose National Party currently governs in coalition with NZ First, dismissed Peters’ remarks as “inappropriate attention-seeking.”

Commenting on Peters’ attack, Xu-Nan said: “It’s a little bit unbelievable to have a Minister for Foreign Affairs, I guess, scapegoating the migrant communities as a distraction to shift the blame away from all of the harm that this government is doing.”

NZ First has previously faced criticism over similar remarks. Last year, deputy leader Shane Jones shouted “send the Mexicans home” at Philippines-born MP Francisco Hernandez, prompting a diplomatic protest from Mexico. Peters later said the comments “may have been expressed differently” in the heat of the moment.