President Trump was briefed this month about intelligence stories that China had provided to pay bounties to fighters in Afghanistan who attacked American troopers there, however the data was uncorroborated and comes months after Mr. Trump dismissed as a “hoax” a C.I.A. evaluation that Russia had paid for such attacks.

It’s unclear whether or not the intelligence on China exhibits that any bounties had been paid, or whether or not any assaults on American personnel had been even tried. United States intelligence businesses acquire huge quantities of data, a lot of which seems to be false or deceptive.

The knowledge, included within the president’s written briefing on Dec. 17 and relayed verbally by the nationwide safety adviser, Robert C. O’Brien — was earlier reported on Wednesday night by Axios and confirmed by U.S. officers.

It comes at a time when Trump administration officers, together with the director of national intelligence, John Ratcliffe, have sought to place extra stress on China, partly within the hope of limiting any plans by the incoming Biden administration to ease tensions with Beijing.

Mr. Trump, Mr. Ratcliffe and different officers have additionally sought to direct consideration towards Chinese language misbehavior in areas the place different American officers contemplate Russia to be a better menace, together with laptop hacking and the usage of disinformation to disrupt American politics.

After the disclosure this month that the USA authorities had been subjected to a huge cyberbreach that American officers, together with Secretary of State Mike Pompeo, confidently attributed to Russia, Mr. Trump angrily forged doubt on that notion and sought to implicate Beijing. “Russia, Russia, Russia is the precedence chant when something occurs,” Mr. Trump wrote on Twitter, charging that the information media avoids “discussing the chance that it could be China (it could!).”

The Axios report mentioned on Wednesday that the underlying intelligence on the bounties, about which it obtained no additional particulars, could be declassified, though it was unclear why or for whom. White Home officers wouldn’t elaborate however didn’t dispute that the intelligence was uncorroborated.

Though tensions between the USA and China have escalated considerably throughout the Trump period, Beijing just isn’t recognized to offer substantial assist to anti-American proxies in fight zones like Afghanistan, and a few nationwide safety consultants had been initially skeptical that Beijing would assist assaults on Individuals. In contrast, many thought-about comparable stories about Russian bounties to be credible.

If confirmed, and notably if traced to political leaders in Beijing, such an motion by China would represent a grave provocation that may demand a response by President-elect Joseph R. Biden Jr. after he takes workplace in January.

A Biden transition official wouldn’t say on Wednesday evening whether or not Mr. Biden, who now receives official day by day intelligence briefings, had been offered with the identical data because the president.

However the official mentioned that the Biden workforce would search to study extra about it from the Trump administration and that it underscored the significance of a totally cooperative transition course of, together with with the Protection Division, which Mr. Biden on Monday accused of “obstruction.”

“Proper now,” Mr. Biden mentioned in Wilmington, Del., “we simply aren’t getting all the data that we want from the outgoing administration in key nationwide safety areas.”

Months earlier than the report involving China, the Pentagon and U.S. intelligence businesses had been investigating stories collected this yr, and first reported by The New York Times, that Russian army intelligence brokers had offered to pay Taliban-linked fighters in Afghanistan for the killing of American troopers there.

The C.I.A. assessed with medium confidence that Russia had covertly provided and paid the bounties to a community of Afghan militants and criminals. The Nationwide Safety Company positioned decrease confidence within the intelligence. However Mr. Pompeo, for one, took the stories critically sufficient to situation a stern face-to-face warning this summer time to his Russian counterpart.

Mr. Trump was equally supplied with a written briefing on that intelligence, however publicly he dismissed it as “faux information” and an extension of what he referred to as the “Russia hoax,” together with the investigation into his 2016 marketing campaign’s ties to the Kremlin. On the identical time, the president advised that subordinates had not finished sufficient to attract the report about Russia to his consideration.

“If it reached my desk, I’d have finished one thing about it,” Mr. Trump mentioned in July. United States officers have mentioned that the assessment regarding Russia was included in his written intelligence brief in February, however that he hardly ever reads that doc.

In a number of subsequent conversations with President Vladimir V. Putin of Russia, Mr. Trump did not raise the matter.

Many questions are excellent in regards to the unverified intelligence concerning China, together with when such bounties had been mentioned to be provided, by whom and to whom. The US and its coalition companions in Afghanistan are combating not solely the Taliban but in addition Al Qaeda, the Islamic State and varied different militant and legal teams.

The reportedly deliberate launch of extra data comes at a time when Democrats and lots of profession intelligence officers are involved that Trump officers like Mr. Ratcliffe have sought to selectively declassify intelligence for political functions, just like the Russia investigation and election interference.