In response, the United Nations passed a range of new sanctions against North Korea, including petroleum and textiles restrictions. Along with Russia, China wants the U.S.to seek dialogue with the North.
Famous for using bombastic, derogatory and often-awkward English slams against enemies, North Korean state media sent people scrambling for dictionaries Friday with a dispatch that quotes leader Kim Jong Un calling President Donald Trump "the mentally deranged US dotard".
And the Benin-Korea Amicable Association said nothing could stop the North from "dashing toward a socialist power like the storming wind".
Hours later, Kim's foreign minister told reporters in NY that Pyongyang could launch a nuclear missile test in response.
It said the state's nuclear ambitions were "a great deed" which provided a "firm guarantee for peace".
Such a test with a live warhead would tell North Korea's engineers whether their bomb design can survive the rigors of flight and re-entry into the Earth's atmosphere, says Michael Elleman, a missile defense expert at the International Institute for Strategic Studies.
Mr. Trump also said China was imposing major banking sanctions, too, but there was no immediate confirmation from the North's most important trading partner.
CHANG: And a final jab - Kim said Trump was a dotard. She said it would draw a "concerted and determined worldwide response" but declined to be specific.
Kim Dong-yub, a former South Korean military official who is now an analyst at Seoul's Institute for Far Eastern Studies, said Kim Jong Un's statement indicated that North Korea will respond to Trump with its most aggressive missile test yet.More news: Kashmir Conflict Should be Resolved Bilaterally by India and Pakistan: China
But Ri said "none other than Trump himself is on a suicide mission" and condemned America's own history with nuclear weapons. North Korea later fired a ballistic missile over Japan and the US military flew powerful bombers and stealth fighter jets over the Korean Peninsula and near Japan in a show of force against the North.
Tests of nuclear-tipped ballistic missiles are rarer still. "We are talking about putting a live nuclear warhead on a missile that has been tested only a handful of times". "The Hwasong-12 has been flight tested just six times, three of which ended in failure". The U.S.is also leaving the door open to negotiations. Ironically, his concurrent threat to abandon the Iranian nuclear deal helped to remove any incentive for Kim Jong-un to come to the negotiating table.
The Chinese Commerce Ministry said it would ban exports of condensate and liquefied natural gas to North Korea and limit textile imports from the North, starting 12 a.m. Saturday. "By doing so, however, he committed an irreversible mistake of making our rockets" visit to the entire US mainland inevitable all the more".
"They have done insane things and tend to carry through with what they have said", Kristensen said in an email exchange.
Under the diplomatic Joint Framework Agreement reached by President Bill Clinton in 1994, the north was provided aid, including two light nuclear reactors, in exchange for it ending its nuclear weapons program.
"I am now thinking hard about what response he could have expected when he allowed such eccentric words to trip off his tongue", Kim said.
On Friday, Trump described Kim as "a madman who doesn't mind starving or killing his people" and that he "will be tested like never before".
Chinese support for sanctions against North Korea - and its faithful implementation of them - has been continually held up by world leaders as a key factor in deterring the rogue state from continuing its weapons development.
The spokesman, Lu Kang, said Beijing complies with U.N. Security Council resolutions.