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.

President Trump railed against Xi Jinping in a late-night social media post days ahead of their planned call, complaining that the Chinese leader is “extremely hard to make a deal with” as trade talks stall.

Senior US and Chinese officials are set to meet in London on Monday for critical trade negotiations as both nations work to salvage their temporary tariff agreement amid accusations of violations from each side.