Imports expanded 12.9 percent year-on-year in dollar terms, leaving the country's global trade surplus for the month at $28.8 billion, a turnaround from a $5 billion deficit the month before.
Those included slashing the US trade deficit with China by $200 billion, cutting tariffs and eliminating subsidies for advanced technology, according to people familiar with the demands.
China's move to higher-value exports is clear, with shipments of lower-end products, such as shoes and apparel, declining year-on-year, but its strategic tech sector is firmly in the crosshair of the White House.
"We don't expect all core differences in the US-China trade relationship to be resolved", Wang Tao, chief China economist in Hong Kong for UBS, wrote in a recent report.
The visit by the Chinese delegation comes soon after a USA presidential delegation led by Mnuchin went to Beijing for trade talks.
"I will be speaking to my friend, President Xi of China, this morning at 8:30", Trump said in a Twitter posting. "And we are working on something that we think will be great for everybody".
It said both parties believe that healthy and stable Sino-US economic and trade relations are very important to the two countries, and both are committed to solving relevant economic and trade issues through dialogue and consultation.
Among the list of hard-line demands that Trump's delegation handed China last week was an ultimatum to cut $200 billion from its annual trade surplus with the U.S.by 2020.
Imports last month also grew more robustly than expected, suggesting China's domestic demand is holding up well, good news for policymakers looking to soften the blow from any trade shocks.
The scale of the challenge facing negotiators was highlighted by a widely reported document that the U.S. delegation gave to the Chinese government outlining some of the American demands.