The commerce ministry is due to hold its weekly news briefing on Thursday.
While Trump hailed the agreement with Xi "an incredible deal", a lack of detail from the Chinese side has left investors and analysts wondering if Trump's exuberance is warranted.
One Chinese official told Reuters officials were "waiting for the leaders to return" before publicizing details.
"China will agree to purchase a not yet agreed upon, but very substantial, amount of agricultural, energy, industrial and other product from the United States to reduce the trade imbalance between our two countries", said White House Press Secretary Sarah Sanders.
Trump raised the stakes on those pledges, saying in a tweet that he expects China to start buying more agricultural products "immediately". The Chinese market, he noted, is good for more expensive cars manufactured in Europe, but also smaller, more affordable ones produced in Japan and South Korea; it's the American-made cars like trucks and big SUVs that don't have quite the same appeal.
The president tweeted directly to USA farmers, some of whom have suffered as a result of Chinese counter-tariffs, to say "Farmers, I LOVE YOU!" Per the president's post, a delegation of U.S. officials will hold negotiations with the Chinese side.
U.S. Representative Steve King, an Iowa Republican, in February 2017 introduced a bill that would have allowed the U.S. government to punish Chinese intellectual property theft by imposing duties on the country's imports.
But so far Beijing has resisted confirming commitments made by Xi and announced by the United States.
But he tweeted that "at some time in the future", Xi, Russian President Vladimir Putin and he "will start talking about a meaningful halt to what has become a major and uncontrollable Arms Race".
Behind Beijing's apparent caution may also be a whiff of fear that the truce might not last, said Andrew Gilholm, of the consultancy Control Risks.
While tariffs alone shouldn't destroy the economy, they certainly add weight to the burden of other problems: falling oil prices, slowing real estate markets, the flattening of the yield curve thanks to "hawkish" comments from the Federal Reserve, and the sinking stock market.
However, a brokerage report speculated that a three-percent jump in Chinese stocks on Monday was partly stoked by enthusiasm based on optimistic but vague reporting in Chinese newspapers.
The United States expects China to take immediate action to cut tariffs on USA auto imports and end intellectual property theft and forced technology transfers as the two countries move toward a broader trade deal, a White House official said on Monday.
Time is running out for the United States to ship soy before Brazilian farmers start their harvest, USA analysts said. "Longer-term, China has more to gain from free trade in autos", with local Chinese manufacturers such as Guangzhou Automobile Group Co. and Geely Automobile Holdings Ltd. looking to move overseas, she said.
"We don't yet have a specific agreement on that", Kudlow said on a conference call with reporters.
"This is China's political culture".