The U.N. Security Council unanimously approved tough new sanctions on North Korea on Saturday including a ban on exports worth over $1 billion - a huge bite in its total exports, valued at $3 billion previous year.
China, as a permanent member of the UNSC, upheld an impartial and objective position and played a responsible and constructive role in the process of the adoption of the resolution, he said.
North Korea has already faced a decade's worth of ever-increasing sanctions backed by the USA and its allies.
The sanctions provided in Resolution 2371 aim to slash North Korea's annual export revenue of US$3 billion by a third.
There are three major components in the resolution: further sanctions against the DPRK's nuclear and missile programs; no intention to harm activities that are not prohibited by the resolution, such as economic activities and cooperation, food and economic assistance; a call for the resumption of the six-party talks, commitment to finding a peaceful solution, and the emphasis of the importance of de-escalating tensions on the Korean Peninsula by the parties concerned, said Liu.
DPRK conducted two intercontinental ballistic missile (ICBM) tests on July 3 and July 28, respectively.
It also expresses regret at North Korea's "massive diversion of its scarce resources toward its development of nuclear weapons and a number of expensive ballistic missile programs" noting United Nations findings that well over half the population lacks sufficient food and medical care and a quarter of the population suffers from chronic malnutrition.
He also called for halting the deployment of the THAAD missile defense system in South Korea, saying it will not resolve the North Korean nuclear stalemate.
As such, this resolution "sends a clear message" to Pyongyang that the Security Council is united in condemning its violations and demanding the country give up its prohibited nuclear and ballistic missile programmes.
In addition, the sanctions place nine individuals and four entities on the United Nations blacklist, including a global asset freeze and travel ban on North Korea's primary foreign exchange bank.
They should be accountable to their people and regional peace in making such choices, he noted. This year, Pyongyang was estimated to earn $251 million from iron and iron ore exports, $113 million from lead and lead ore exports, and $295 million from fish and seafood exports, the diplomat said.
"It's going to hit hard but it's going to make a strong point to North Korea that all this ICBM and this nuclear irresponsibility has to stop".
Though the economic sanctions have teeth, Washington didn't get everything it wanted.
The draft resolution asks the Security Council committee monitoring sanctions against North Korea to ban the import of many more so-called "dual-use items" that have commercial use but can also be used in conventional weapons or biological, chemical and nuclear weapons.
North Korea has repeatedly said it will never give up its nuclear arsenal, which it sees as a guarantee of its security.