The U.S.-China talks on trade resemble arms-control negotiations, with export controls the key weapons. As part of a monthslong feud, the two sides choked off the supply of such exports as rare earths or semiconductor technology in a bid to gain an edge.

Officials from both sides are meeting on Monday in London, aiming to resolve differences over tariffs and supply chains that have endangered a fragile truce between the countries.

Donald Trump has said the US and China’s deal to restore their trade war truce is “done” after two days of marathon negotiations in London. In a post on his Truth Social network on Wednesday the US President hailed a breakthrough reached in bilateral talks in London late the night before.