Donald Trump has proposed deploying Chinese troops as peacekeepers in post-war Ukraine.
The US president has backed a proposal first made by Russian President Vladimir Putin.
This was reported by the "Financial Times" (FT). The leading business publication cited four people familiar with the discussions in the White House.
Trump has proposed inviting China to provide peacekeepers to monitor the neutral zone along Ukraine's 1,300-kilometer front line as part of a peace agreement with Russia. This was during a meeting with European leaders and the Ukrainian president at the White House last week.
"That is false", a senior Trump administration official said, adding that "there was no discussion of Chinese peacekeepers".
Russian officials first raised the idea of Chinese peacekeepers in the context of a framework for security guarantees during early talks between Russia and Ukraine in Istanbul in the spring of 2022.
The idea is rejected by European capitals and was previously rejected by Ukrainian President Volodymyr Zelensky due to Beijing's critical support for Russia's military actions.
Last week's meeting was part of ongoing discussions on imposing a possible ceasefire, Western security guarantees to be provided to Ukraine, and the structure of any post-conflict agreement.
Trump is pushing the two sides to agree on a peace deal, but Moscow and Kiev remain far apart on key details, including territorial control after the war.
Senior military and political officials from the United States, Ukraine and major European capitals have discussed a framework that would see a demilitarized zone patrolled by neutral peacekeepers as the first stage of a peace deal.
China has said it is ready to play a "constructive role" in resolving the war after Russia recently offered Beijing to be one of the guarantors of Ukraine's security as part of a peace deal.
Russian Foreign Minister Sergei Lavrov this month suggested that the permanent members of the UN Security Council, which include Russia and China, support a security guarantee for Ukraine in a deal to end the Kremlin's war.
But China's foreign ministry said this week that media reports that Beijing had offered to participate in a peacekeeping force for Ukraine were "not true.".