In a written statement, Trump on Friday said US strategy is created to make use of nuclear weapons less likely.
The latest Nuclear Posture Review published by the Pentagon called for a larger arsenal of smaller, low-yield nuclear weapons to act as a more "credible" deterrent to threats, particularly from Russian Federation.
China's defence ministry spokesman, Mr Ren Guoqiang, responded in a statement yesterday that China is "firmly opposed" to the US' new nuclear weapons policy statement, describing its speculation about Chinese intentions as "wild guesses".
What is the new U.S. policy?
Low-yield weapons are smaller, less powerful bombs with a strength below 20 kilotonnes.
North Korea has continued to pursue nuclear weapons development, and Iran retains much of the capacity needed to develop a nuclear weapon within a year of deciding to do so, according to the review.
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The policy also recommends: Land-based ballistic missiles, submarine-launched missiles, and air-delivered weapons-to be extensively modernized, as begun under ex-President Obama.
China decried the US for its "Cold War mentality" on Sunday after Washington announced last week that it plans to diversify its nuclear arsenal with smaller bombs. Bringing back sea-based nuclear missiles.
Foreign Minister Sergei Lavrov expressed "deep disappointment" at the plan.
In a tweet published on Saturday, Zarif wrote, "The US Nuclear Posture Review reflects greater reliance on nukes in violation of the NPT, bringing humankind closer to annihilation".
"We hope that the U.S. earnestly takes up its special disarmament responsibility, correctly understands China's strategic intentions and objectively views China's national defence and military build-up". The 74-page report, the Pentagon's first since 2010, cast China as "a major challenge to United States interests in Asia".
The Pentagon said last week that the planned tactical warhead for some ballistic missiles and the reintroduction of a nuclear-tipped cruise missile would help to deter a limited nuclear strike. Past year it said that Washington's defense strategy tied to "outdated notions".
According to reports, the review of US nuclear policy has already riled Russian Federation, which viewed the document as confrontational, and raised fears that it could increase the risk of miscalculation between the two countries.