Top trade officials from the US and China are meeting in Washington as a deadline to strike a deal approaches.
This is the second round of talks since Presidents Donald Trump and Xi Jinping met in Argentina last year and agreed to negotiate in the hope of defusing an escalating tariff war.
There is widespread scepticism that the two sides can reach a substantive deal by the 1 March deadline.
Recent charges against Huawei have added to the complications.
At a press conference this week, Treasury Secretary Steven Mnuchin and White House economic adviser Larry Kudlow made few promises.
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