The president said he and Chinese President Xi Jinping still need to sign off on a preliminary deal, even though he called it "done."

While Donald Trump hailed the outcome of trade talks in London, Xi Jinping walked away with an understated strategic gain: a negotiating process that buys China time and helps defuse the threat of more harmful tariffs and technology curbs.

Chinese exports of rare earth minerals, which are vital to carmakers and other industries, and China's access to high-end technology from the U.S., including computer chips, are high on the agenda.

LONDON, June 9 (Reuters) - Top U.S. and Chinese officials will sit down in London on Monday for talks aimed at defusing the high-stakes trade dispute between the two superpowers that has widened in recent weeks beyond tit-for-tat tariffs to export controls over goods and components critical to global supply chains.

London — President Trump declared on Wednesday morning ... its current 10% tariffs on goods imported from the U.S., while the U.S. would keep 55% tariffs on Chinese imports. There was no immediate confirmation from China's government of any terms agreed ...

U.S. and Chinese negotiators agreed late Tuesday to try again to implement the trade war truce that had collapsed after it was reached during an earlier round of talks in Geneva.

American and Chinese officials are meeting for a second day of trade talks in London to shore up a fragile truce over tariffs. Negotiations are expected to focus on Beijing's shipments of rare earths and Washington's restrictions on chip exports.