The meeting is likely to be another effort to clinch a trade deal with the U.S. heading into the March 1 tariff deadline. -China talks with U.S. Trade Representative (USTR) Robert Lighthizer last week, and added that he thought the talks were "constructive and serious".
A second source said that Xi is expected to meet the United States delegation in Beijing this week, although the specific timing has not yet been confirmed.
Mnuchin, asked by reporters as he left his Beijing hotel what his hopes were for the visit, said "productive meetings".
US President Donald Trump has suggested that he might extend the deadline for reaching a trade deal with China beyond March 1st, when additional US tariffs on a wide range of Chinese imports are set to go into effect. And top White House economist Larry Kudlow said Thursday that while Trump was "optimistic" about prospects for a deal, there remained a "sizable distance" separating the two sides.
USA tariffs on $200 billion worth of imports from China are scheduled to rise to 25 percent from 10 percent if the two sides can not reach a deal by the deadline, increasing pain and costs in sectors from consumer electronics to agriculture.
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She also questioned whether the call for "frictionless" trade would mean reneging on Labour's commitment to end free movement. Her response comes ahead of another week of Brexit debate and voting in Westminster.
Trump said talks in Beijing are "going well", but acknowledged bilateral talks between him and Xi are unlikely to come to pass before the current March 2 deadline.
The White House said there would be a preparatory meeting of senior officials beginning February 11 and the talks would include officials from the Agriculture, Energy and Commerce Departments.
Washington is expected to keep pressing Beijing on long-standing demands that it make sweeping structural reforms to protect American companies' intellectual property, or IP, end policies aimed at forcing the transfer of technology to Chinese companies, and curb industrial subsidies. But the two sides are only just starting the work of drafting a common document and are still tussling over how a deal may be enforced, which US officials have repeatedly called a crucial element.
Both the Chinese government and Huawei have dismissed these concerns.