Donald Trump, the US president, and Xi Jinping, China’s president, are facing hurdles in building on the fragile truce they reached in their trade war, after the two countries left many thorny issues unresolved and offered different interpretations of the agreement.

In a much-anticipated working dinner in Buenos Aires following the G20 summit, Mr Trump and Mr Xi agreed on Saturday to a temporary ceasefire, in which the US president suspended his decision to impose higher tariffs on Chinese imports next year.

But the bare-bones agreement will trigger a new round of talks over the coming months between Washington and Beijing that are bound to be fraught with pitfalls, as the two countries aim to tackle some of the more sensitive issues, including ownership and access to technology and intellectual property.