SEOUL — Because it ends its first high-level diplomatic tour of Asia on Thursday, the Biden administration is banking on worldwide alliances within the area to assist stem the rising menace posed by North Korea’s ballistic missiles and nuclear capabilities.

However the nation that’s maybe in the most effective place to affect Pyongyang is one which President Biden has more and more seen as an adversary: China.

Following conferences this week in South Korea and Japan, the administration finds itself dealing with a diplomatic stalemate of the sort that irritated former President Barack Obama and drove former President Donald J. Trump to declare his love for Kim Jong-un, the chief of North Korea, in a manic however in the end thwarted drive for a breakthrough.

At stake is the danger posed by North Korea’s weapons methods and its repressive domestic policies involving surveillance, torture and jail camps, which international officials have said quantity to human rights violations. Latest makes an attempt by the Biden administration to open a line of communication have been rebuffed by North Korea, leaving American officers to enchantment to its companions within the area to affix a strain marketing campaign in opposition to Pyongyang.

“With regard to North Korea, crucial outreach, or engagement, is with our companions and allies — that’s an enormous a part of the explanation why we’re right here,” Secretary of State Antony J. Blinken informed reporters after talks in Seoul on Thursday with Protection Secretary Lloyd J. Austin III and South Korea’s international and protection ministers.

He mentioned the Biden administration was consulting carefully with the governments of South Korea, Japan and different allied nations “which might be involved by the actions which might be being taken by North Korea.”

However China is North Korea’s chief financial and political benefactor, and Mr. Blinken acknowledged that Beijing “has a crucial position to play” in any diplomatic effort with Pyongyang. He prompt China was additionally involved about North Korea’s nuclear and missiles packages.

“China has an actual curiosity in serving to to cope with this,” Mr. Blinken mentioned. “So we glance to Beijing to play a job in advancing what’s, I feel, in everybody’s pursuits.”

Whether or not the USA can recruit Beijing to take part can be clearer after talks in a while Thursday and on Friday in Anchorage, Alaska, when China’s prime two diplomats meet with Mr. Blinken and the White Home nationwide safety adviser, Jake Sullivan. American officers have billed the talks as a blunt alternate of coverage views.

Easy methods to include North Korea can be among the many points mentioned in Anchorage. It is likely one of the few areas by which American officers imagine they’ll cooperate with China because the Biden administration continues to confront Beijing’s army expansionism, its crackdown on democracy and its economic coercion within the Indo-Pacific area.

Mr. Blinken has previously described China as America’s “greatest geopolitical take a look at of the twenty first century,” and the Biden administration has issued stern warnings and monetary sanctions in opposition to Beijing, including on Wednesday, in response to a few of its actions.

“It’s affordable to attempt to enlist China’s help, given its political and financial relationship with North Korea and its total heft within the area,” mentioned Frank Aum, a North Korea knowledgeable on the U.S. Institute of Peace in Washington.

However Mr. Aum additionally famous that China has no management over a raft of calls for North Korea has made in return for disarmament, together with the lifting of American sanctions and an finish to joint U.S.-South Korean army workouts.

President Moon Jae-in of South Korea is keen for the USA to restart diplomatic discussions with North Korea and different regional powers. He has repeatedly argued {that a} nuclear-free Korean Peninsula is feasible, insisting that Mr. Kim is keen to surrender his weapons and concentrate on financial progress ought to Washington present the best incentives.

After assembly with the American envoys, Overseas Minister Chung Eui-yong of South Korea mentioned he hoped for an “early resumption of dialogue” between the USA and North Korea, and that the federal government in Seoul would proceed to help Washington’s efforts to ascertain diplomatic contact with Pyongyang.

He additionally prompt that Mr. Trump’s direct diplomatic method had supplied “primary ideas” on the way to obtain denuclearization and peace on the Korean Peninsula.

“Our expertise prior to now three years has proved that if North Korea is persistently engaged based mostly on a detailed cooperation between South Korea and the USA, it’s attainable to resolve the nuclear downside,” Mr. Chung mentioned.

It has been greater than a 12 months since North Korea has straight spoken to American officers, Mr. Blinken mentioned in Tokyo. And the conferences in Seoul this week have been the primary between South Korean international and protection ministers and their American counterparts in 5 years.

Mr. Moon’s political inventory rose when he helped to bring Mr. Trump and Mr. Kim collectively for 2 summits. However after the second, in 2019, abruptly ended with out an settlement on American sanctions reduction or the tempo of North Korean disarmament, Mr. Moon struggled to regain his relevance in negotiations. Final June, North Korea blew up the joint inter-Korean liaison workplace on its aspect of the border, the primary of a series of actions that threatened to reverse a fragile détente.

Officers in North Korea will dismiss Washington’s makes an attempt to ascertain dialogue “until the U.S. rolls again its hostile coverage,” Choe Son-hui, the nation’s first vice international minister, mentioned on Thursday. “Due to this fact, we’ll disregard such an try by the U.S. sooner or later, too.”

Ms. Choe cited army workouts the USA has held with South Korea and speak in Washington of imposing extra sanctions on the North as examples of that hostility. In a diatribe issued hours after the senior American envoys landed in Tokyo earlier this week, North Korea warned the Biden administration to “chorus from inflicting a stink.”

North Korea has not performed any weapons exams because it launched short-range missiles in March of final 12 months. However throughout a army parade in October, it unveiled a brand new, untested intercontinental ballistic missile that appeared larger and extra highly effective than the I.C.B.M. it examined in late 2017 earlier than Mr. Kim began diplomacy with Mr. Trump.

In a celebration assembly in January, Mr. Kim vowed to further advance his nation’s nuclear capabilities, declaring that it might construct new solid-fuel I.C.B.M.s and make its nuclear warheads lighter and extra exact.

Analysts mentioned Pyongyang was carefully following this week’s journeys by Mr. Blinken and Mr. Austin to Tokyo and Seoul for clues to the Biden administration’s method. It’s anticipated that North Korea will resolve after watching Washington whether or not to renew weapons exams and create a brand new cycle of tensions to realize leverage.

Mr. Moon is anxious to salvage his once-proud diplomacy over North Korea. His assembly on Thursday with Mr. Blinken and Mr. Austin was meant to ship “a powerful message, demanding that the USA be extra versatile towards participating North Korea with dialogue,” mentioned Lee Byong-chul, a North Korea knowledgeable at Kyungnam College’s Institute for Far Japanese Research in Seoul.

“North Korea’s sentiment towards Moon Jae-in is certainly one of disappointment,” Mr. Lee mentioned. “Moon has been in a fix ever for the reason that North Korea-United States talks broke down.”

Mr. Blinken mentioned the American posture towards North Korea would come with a mixture of regional strain choices and the potential for future diplomacy when the Biden administration’s present coverage assessment is concluded, as quickly as subsequent month.

Mr. Aum, the North Korea knowledgeable on the U.S. Institute of Peace, mentioned that the coverage might embrace plying China to do extra to rein in North Korea, probably by deploying extra weapons methods within the area or conducting bigger army workouts with South Korea — each of which might irritate Beijing.

China has largely urged North Korea and the USA to resolve the deadlock themselves, though it has referred to as for sanctions reduction and a pause of American army workouts with Seoul in alternate for Pyongyang freezing its nuclear and missile exams.

“All events ought to work collectively to maintain peace and stability on the Korean Peninsula,” a spokesman for China’s Ministry of Overseas Affairs, Zhao Lijian, mentioned this week. “China will proceed to play a constructive position on this course of.”

Steven Lee Myers and John Ismay contributed reporting from Seoul.