China has made unprecedented proposals in talks with the United States on a range of issues including forced technology transfer as the two sides work to overcome remaining obstacles to a deal to end their protracted trade war, U.S. officials told Reuters. U.S. President Donald Trump imposed tariffs on $250 billion of Chinese imports last year in a move to force China to change the way it does business with the rest of the world and to pry open more of China's economy to U.S. companies. Among Trump's demands are for Beijing to end practices that Washington alleges result in the systematic theft of U.S. intellectual property and the forced transfer of American technology to Chinese companies. China put proposals on the table in the talks that went further than in the past, including on technology transfer, said one of four senior U.S. administration officials who spoke to Reuters.

Chinese President Xi Jinping (R) waves to the press as he walks with US President Donald Trump at the Mar-a-Lago estate in West Palm Beach, Florida, April 7, 2017. Jim Watson | AFP | Getty Images

Negotiators have made progress on the details of the written agreements that have been hashed out to address U.S. concerns, he said. "If you looked at the texts a month ago compared to today, we have moved forward in all areas. We aren't yet where we want to be," the official said, speaking on condition of anonymity. "They're talking about forced technology transfer in a way that they've never wanted to talk about before - both in terms of scope and specifics," he said, referring to Chinese negotiators. He declined to give further detail. Reuters reported previously that the two sides were working on written agreements in six areas: forced technology transfer and cyber theft, intellectual property rights, services, currency, agriculture and non-tariff barriers to trade. U.S. Trade Representative Robert Lighthizer and Treasury Secretary Steven Mnuchin arrive in Beijing on Thursday for a new round of talks with Chinese officials to work on a deal that would end a months-long trade war that has cost both sides billions of dollars and hurt global economic growth. The in-person talks, which will be followed by a round in Washington next week, are the first face-to-face meetings the two sides have held in weeks after missing an initial end-of-March goal for a summit between U.S. President Donald Trump and Chinese President Xi Jinping to sign a pact. Talks would continue as long as progress is being made on the core issues, the official said. "It could go to May, June, no one knows. It could happen in April, we don't know," another administration official said. The two sides still have differences over intellectual property and how to enforce a deal, he said.

'Some tariffs will stay'

China wants the United States to lift its tariffs as part of a deal. Washington, which is cognizant that the tariffs give it leverage to ensure Beijing follows through on any commitments it makes, is wary of lifting them right away. Trump said last week the United States may leave tariffs on Chinese goods for a "substantial period" to ensure compliance. "Some tariffs will stay," the second official said. "There's going to be some give on that, but we're not going to get rid of all the tariffs. We can't."