"China will start from agricultural products, autos and energy to immediately implement specific items that China and the US have agreed upon", Ministry of Commerce Spokesman Gao Feng told reporters in Beijing.
The ministry said that China would try to work quickly to implement specific items already agreed upon, as both sides "actively promote the work of negotiations within 90 days in accordance with a clear timetable and road map".
Beijing has yet to confirm Mr Trump's claim that China promised to cut auto tariffs and immediately buy more American farm goods.
US markets rallied on Monday following the Trump administration's claim of an imminent truce in the U.S. -China trade cease-fire, contributing to a broad stock market plunge and intensifying fears of a global economic slowdown.
On Tuesday, U.S. stock markets plummeted by about 3 percent, largely due to investors' uncertainty about the tariff war with Beijing.
Failure would raise the specter of a major escalation in the trade battle, with fresh USA tariff action and Chinese retaliation possibly as early as March.
Trump and Xi said they would hold off on imposing additional tariffs for 90 days starting on December 1 while they sought to resolve their trade disputes that have seen the flow of hundreds of billions of dollars worth of goods disrupted by tariffs.
The two sides will also discuss intellectual property protection, technology cooperation, market access and balanced trade, and "work hard to reach a consensus", Mr Gao said.
The Ministry of Commerce said Thursday China will immediately start implementing agreements on agricultural products, energy and cars that were reached at the weekend summit between Chinese and US leaders over their ongoing trade dispute.
Chinese officials have been instructed to take necessary steps for the purchases, two officials told the outlet.
Trump has argued that China for decades has abused global trade rules to lure away United States jobs, steal USA intellectual property, subsidise its own companies, and strong-arm U.S. firms.
White House officials have also struggled to explain whether China had actually agreed to drop a 40 per cent tariff on United States cars as part of the deal.
In return for the postponement in the higher US tariffs, the White House said China had agreed to step up its purchases of USA farm, energy and industrial goods.
It described the discussions between Mr Trump and Mr Xi as "successful", adding it was "confident" that their agreement will be implemented "the sooner the better". The statement did not say whether Trump raised tariffs with executives from BMW, Daimler and Volkswagen. "President Xi and I want this deal to happen, and it probably will", he said.
The Republican president indicated he would not be opposed to extending the 90-day truce he and Chinese President Xi Jinping agreed to over the weekend.
"Ultimately, I believe, we will be making a deal - either now or into the future", he wrote.
What looked earlier this week like a resolution to the costly automotive tariff war with China has proven to be little more than a presidential boast.
"I am not sure, you know, that the objective is a trade agreement".
President Donald Trump agreed Saturday to postpone USA tariff hikes in a fight over Beijing's technology policy by 90 days while the two sides negotiate. "Narrow agreements and modest concessions in their ongoing trade dispute will not bridge the wide gulf in their respective economic, political and strategic interests".
Trump "shared his vision of all automakers producing in the United States and creating a more friendly business environment", the White House said in a statement afterward.
The comments by the president and his top advisers over the past 48 hours have only added to China's confusion about their negotiating partners.
The Republican president appeared to address one of the concerns by indicating he would not be opposed to extending the 90-day truce.