U.S. President Barack Obama and Chinese Premier Li Keqiang agreed on Monday to step up cooperation in the United Nations Security Council and in law-enforcement channels after North Korea's fifth nuclear test, the White House said.
China and the United States are also targeting the finances of Liaoning Hongxiang Industrial, a Chinese conglomerate headed by a Communist Party cadre, that the Obama administration thinks has a role in assisting North Korea's nuclear program, the Wall Street Journal reported on Monday.
U.N. diplomats say the two countries have started discussions on a possible U.N. sanctions resolution in response to the nuclear test earlier this month, but Beijing has not said directly whether it will support tougher steps against North Korea.
Obama met Li on the sidelines of the annual United Nations General Assembly session in New York.
"Both leaders condemned North Korea’s September 9 nuclear test and resolved to strengthen coordination in achieving the denuclearization of the Korean Peninsula, including by invigorating cooperation in the United Nations Security Council and in law enforcement channels on North Korea," a White House statement said.
China is isolated North Korea's most important diplomatic backer and its biggest trading partner.
It has been angered by Pyongyang's repeated nuclear and missile tests and signed on to increasingly tough U.N. sanctions, but it has said it believes such steps are not the ultimate answer and called for a return to talks with North Korea.
Chinese Foreign Minister Wang Yi told his Japanese counterpart last week China opposes "unhelpful" unilateral sanctions on North Korea but will work within the United Nations to formulate a response.
Washington has pressed Beijing to do more to rein in North Korea. The United States has said it is willing to negotiate with the North if the country commits to get rid of its nuclear weapons, which Pyongyang has refused to do.