In a follow-up tweet, President Trump added that North Korea could lose up to a billion dollars because of the sanctions.
The vote comes after a month of private negotiations between the United States and China on the issue.
"This resolution is the single largest economic sanctions package ever leveled against the North Korean regime", U.S. Ambassador to the United Nations, Nikki Haley said.
While Ri spurned talks with the South, he went ahead and held bilateral talks with the Russian and Philippine prime minister, Money Today reported.
"It's not that easy but it is a direction we need to work together towards", Wang said of the six-country talks, which used to be hosted by China and were stopped in 2009.
China has repeatedly said it was committed to enforcing increasingly tough United Nations resolutions on North Korea, though it has also said what it terms "normal" trade and ordinary North Koreans should not be affected.More news: Watch out Dunphys: The Beckhams take over the Modern Family set
"Destabilizing actions, such as Chinese land reclamation, construction and militarization of disputed features, makes it harder for the region to resolve these disagreements peacefully", Susan Thornton, acting assistant secretary of state for East Asian and Pacific affairs, said.
Trump, whose administration is moving to crack down on leaks of USA government information, also retweeted a Fox News report based on anonymous sources that said us spy satellites had detected North Korea moving anti-ship cruise missiles to a patrol boat.
Speaking to reporters on the sidelines of the Asean foreign ministers meeting in Manila on Sunday, China's top diplomat Wang Yi said China played a "responsible and constructive" role in the UN's decision to pass Resolution 2371.
"Do not violate the U.N.'s decision or provoke global society's goodwill by conducting missile launching or nuclear tests", Wang said, in an unusually direct admonition.
"Military solutions are now fully in place, locked and loaded, should North Korea act unwisely".
While many countries have signed the U.N.'s nuclear weapons agreement, North Korea said that it wants to keep its technology to prevent an invasion from the United States. He said the countries needed to show Pyongyang that the door to dialogue was open if North Korea gave up its nuclear weapons and missile programs, according to a Moon spokesman. But he also said it was not as simple as North Korea stopping launches for a few days or weeks. "They look at the Iran deal and they see that just one president later, they [U.S.] is looking at renegotiating and new rounds of sanctions..."More news: Alabama judge calls teacher sex charges unconstitutional
Triggering an economic meltdown in North Korea would inevitably produce a spillover effect in China, he said. In a separate statement to reporters in Manila, North Korea called President Donald Trump's "America First" policy unsafe and said its nuclear program was necessary to avoid a US invasion similar to those in Afghanistan, Iraq and Libya. Pyongyang views the military exercises as rehearsals for an invasion.
He was, of course, being diplomatic, because many more people - the North Koreans surely, the United States, and its allies in the region - will surely be drawn into the conflict and inevitably suffer.
Infusing the diplomatic gathering with dramatic intrigue was the presence of Ri, the odd man out at a meeting dominated by concerns about his nation's nuclear proliferation. "North Korea would use the talk as a bargaining chip with the US, as their goal is to have dialogue with Washington, not Seoul".
Would Tillerson interact with his North Korean counterpart, even informally, if they crossed paths in Manila?
In the chairman's statement, the ASEAN Regional Forum also expressed support for the "complete, verifiable, and irreversible" denuclearization of the North in a peaceful manner.More news: Liverpool deny claims that Philippe Coutinho has handed in a transfer request
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