President Donald Trump and China’s Xi Jinping will meet over dinner Saturday evening in Buenos Aires marking a pivotal moment in the escalating trade war between the world’s two largest economies.

Trump is hopeful for a breakthrough with Xi but is ready to impose more tariffs if the upcoming talks don’t yield progress, Larry Kudlow, Trump’s top economic adviser, told reporters Tuesday during a briefing ahead of the Group of 20 meeting in Argentina. Washington and Beijing remain at odds on key issues such as U.S. accusations of intellectual property theft and forced technology transfer, he said.

“As you can imagine this is a big deal, this meeting -- the stakes are very high,” Kudlow said. “It’s an opportunity to turn a new page, break through. President Xi can step up and come up with some new ideas for us.”

The dinner with Xi is scheduled as one of the last events on Trump’s itinerary there before he returns to Washington, Kudlow said. He declined to say what other U.S. officials will join Trump in the session.

Trump said on Monday that he will likely push forward with plans to increase tariffs on US$200 billion of Chinese goods. In September, the Trump administration announced a 10 per cent tariff on US$200 billion of Chinese goods, and said the rate will rise to 25 per cent on Jan. 1.

If the two sides fail to reach a deal, Trump said he will also impose tariffs of either 10 per cent or 25 per cent on the remaining US$267 billion in annual U.S. trade with China.

Trump surprised his aides earlier this month with a call to Xi to restart the stalled negotiations. Since then, communications have picked up between the two sides, said Kudlow.

“I don’t want to go overboard, but he’s indicated some optimism. We have an opportunity to extend that optimism, break some new ground,” Kudlow said. “So we’ll see.”