WASHINGTON/BEIJING (Reuters) - China struck a more aggressive tone in its trade war with the United States on Friday, suggesting a resumption of talks between the world’s two largest economies would be meaningless unless Washington changed course.

The tough talk capped a week that saw Beijing unveil fresh retaliatory tariffs, U.S. officials accuse China of backtracking on promises made during months of talks and the Trump administration level a potentially crippling blow against one of China’s biggest and most successful companies.

Chinese foreign ministry spokesman Lu Kang, asked about state media reports suggesting there would be no more trade negotiations, said China always encouraged resolving disputes with the United States through dialogue and consultations.

“But because of certain things the U.S. side has done during the previous China-U.S. trade consultations, we believe if there is meaning for these talks, there must be a show of sincerity,” he told a daily news briefing.

CNBC, citing sources, said the trade talks had stalled and the next round of discussions was “in flux.”

The United States raised Beijing’s ire this week when it announced it was putting Huawei Technologies Co Ltd, the world’s biggest telecoms equipment maker, on a blacklist that could make it extremely hard to do business with U.S. companies.

China has yet to say whether or how it will retaliate, although its state media is sounding an increasingly strident note. The ruling Communist Party’s People’s Daily published on Friday a front-page commentary that evoked the patriotic spirit of the country’s past wars.

“The trade war can’t bring China down. It will only harden us to grow stronger,” it said.

Global stocks, which rebounded this week on the prospect of another round of U.S.-China talks, suffered a fresh bout of selling and China’s yuan slid to its weakest against the U.S. dollar in almost five months. Prices of U.S. government debt were trading higher.[MKTS/GLOB]

The increasingly acrimonious trade dispute has rattled investors who fear that the countries are careening dangerously down a track that will badly damage global supply lines and put the brakes on an already slowing world economy.

The South China Morning Post, citing an unidentified source, reported that a senior member of China’s Communist Party said the trade war could reduce China’s 2019 economic growth by 1 percentage point in the worst-case scenario.

“Both sides might need some prodding, but we’ve had a very clear opportunity for one side or the other ... to say this isn’t going to work ... and neither side did,” said Derek Scissors, an expert on Sino-U.S. economic relations at the American Enterprise Institute think tank, who put the chance of a deal this year at over 50/50.

(Graphic: Trickle down tariffs - tmsnrt.rs/2WIu31i)

AUTO TARIFFS

U.S. President Donald Trump, who has embraced protectionism as part of an “America First” agenda aimed at rebalancing global trade, has accused China of backing out of a deal earlier this month that would have ended the 10-month dispute.

Earlier this month, Reuters reported China had backtracked on commitments to change its laws to resolve core U.S. complaints about theft of intellectual property, forced technology transfers and other practices.

Trump punctuated two days of talks in Washington last week with a decision to raise tariffs on $200 billion in Chinese imports to 25 percent from 10 percent. The negotiations ended in a stalemate.

A container is carried onto a truck in a logistics center near Tianjin Port, in northern China, May 16, 2019. REUTERS/Jason Lee

On Monday, Beijing said it would raise its tariffs on a revised list of $60 billion in U.S. goods effective June 1. Trump, in turn, said he is considering slapping tariffs on the remaining $300 billion in Chinese imports to the United States.

The U.S. president also continues to dangle the possibility of imposing tariffs of up to 25% on imported cars and parts, a move that could be devastating for a number of U.S. trading partners, including Japan and Germany.

The White House said on Friday that Trump’s decision on auto tariffs would be delayed by up to six months to allow more time for trade talks with the European Union and Japan. Trump faced a Saturday deadline to make a decision.

It added, however, that the U.S. president agreed with findings by the U.S. Commerce Department that imported vehicles and parts can threaten U.S. national security, a designation likely to anger some U.S. allies.

Automakers have strongly opposed the tariffs, saying they would hike prices and threaten thousands of U.S. jobs. There is also strong opposition in the U.S. Congress, with many prominent members of Trump’s Republican Party rejecting the idea.

U.S. Senate Minority Leader Chuck Schumer, a Democrat, praised the administration’s decision to delay the auto tariffs.

“Positive step. The pressure must be strong on China, not on our allies who we should encourage to join us in confronting China,” Schumer tweeted.

The United States and Canada also announced on Friday a deal to remove tariffs on Canadian steel and aluminum in exchange for new curbs to keep dumped metals from China and other nations out of the U.S. market. The Mexican president’s office later said Mexico had reached a similar deal with the United States.

The metals tariffs were an aggravation for the Canadian and Mexican governments and had been a major hurdle to enacting the U.S.-Mexico-Canada Agreement, the deal that would replace the 25-year-old North American Free Trade Agreement.