The Arms Control Association in the US also said it understood that the US nuclear weapons strategy and posture remained unchanged from the 2022 Nuclear Posture Report, and there was no reorientation from Russia to China.

Previously, the New York Times also said that the White House had never announced that Mr. Biden had approved the revised strategy called "Nuclear Employment Guidance", but an unclassified notice of this revision was expected to be sent to the US Congress before Mr. Biden left office.

The paper said that in recent speeches, two senior US administration officials were allowed to mention the revision of the strategy. The paper wrote that the strategy is updated every four years or so.

Asked about the report, White House spokesman Sean Savett said: "This administration, like four previous administrations, has issued a Nuclear Posture Review and Nuclear Weapons Planning Guidance."

"Although the specific text of the Guidance is classified, its existence is not secret. The Guidance issued earlier this year was not directed at any particular entity, country, or threat."

Daryl Kimball, executive director of the Arms Control Association, said US intelligence estimates that while China could increase its nuclear warheads from 500 to 1,000 by 2030, Russia currently has about 4,000 nuclear warheads “and remains the primary driver of US nuclear strategy”.

The US strategy is to pursue nuclear arms limitations with China and Russia, but if China continues on its current path and Russia exceeds the limits of the New START Treaty, the US may have to consider adjusting the size and composition of its nuclear forces at some point in the future, Kimball said.

Hong Hanh (according to Reuters)