The United States has 20 times more nuclear warheads than China.
China "always abides by the principle of no first use of nuclear weapons under any circumstances", Ren said, and will "unconditionally not use or threaten to use nuclear weapons against non-nuclear weapon states".
"The country that owns the world's largest nuclear arsenal, should take the initiative to follow the trend instead of going against it", China's defense ministry said on Sunday, reports BBC.
Moscow on Saturday denounced the "bellicose" and "anti-Russian" nature of the new U.S. nuclear policy, warning it would take necessary measures to ensure its own security.More news: 29 women held in Iran for protesting against hijab
The doctrine notes that these activities are not intended at being employed for nuclear warfare, however, they are aimed at raising the USA nuclear threshold to ensure that the country's potential adversaries perceive no possible advantage in nuclear escalation.
He said the USA is playing up the threat of its nuclear strength.
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.
In recent years, the United States has reduced its number of nuclear weapons as others, such as Russian Federation and China, have added new nuclear capabilities.More news: Stormy Daniels cancels appearance on 'The View'
The U.S. unveiled the strategy on Friday.
American nuclear planners believe potential adversaries overseas, especially Russian Federation, assume America would never use its existing arsenal as the effects would be too devastating and provoke globally catastrophic retaliation.
During his campaign, Trump promised to expand and strengthen the United States' nuclear arsenal.
"Peace and development are irreversible global trends". The threat from North Korea and the uncertainty surrounding Iran are also major driving factors mentioned by the NPR.
In 1970, the Treaty on the Non-Proliferation of Nuclear Weapons, or NPT, was ratified, and it was extended indefinitely in 1995.More news: Syria is making new chemical weapons despite 2013 deal