PYONGYANG, North Korea — After months of ignoring Chinese warnings to give up nuclear weapons, North Korean leader Kim Jong Un sent a high-level confidant to Beijing on Wednesday, in a possible effort to mend strained ties with his country's most important ally and a sign that he may be giving diplomacy a chance.
The trip by Vice Marshal Choe Ryong Hae, a senior Workers' Party official and the military's top political officer, is taking place as tensions ease somewhat on the Korean Peninsula after near-daily vows from Pyongyang to attack Washington and Seoul in March and April.
The United States, Japan, South Korea, China and Russia have been busy discussing how best to engage with the North Koreans. Japan sent an envoy to North Korea last week to discuss decades-old abductions of its citizens, a move that has drawn concern among allies of Tokyo who want denuclearization to be the focus of talks.
Choe's visit is the first this year by a top North Korean official to China, which is under pressure from the U.S. and others to rein in its belligerent neighbor. It's also the first since a change of leadership in Beijing, whose new leaders have demonstrated a willingness to work with Washington to harry Pyongyang over its nuclear weapons programs even as stability in North Korea remains the Chinese government's priority.
North Korea also revealed Wednesday that a former defense minister, Kim Kyok Sik, was promoted to chief of the Korean People's Army in the latest in a series of high-level military reshuffles as Kim Jong Un elevates a new generation of military leaders.
Foreign analysts see Choe's trip as part fence-mending mission, part appeal for aid.
The last high-level North Korea-China meeting took place when Chinese Communist Party chief Xi Jinping sent a Politburo member to Pyongyang in November. Weeks later, North Korea launched a long-range rocket, followed by an underground nuclear test in February. That test, the country's third, drew tightened sanctions by the U.N. and United States.
Showing its displeasure with North Korea, China has tightened inspections on cross-border trade and its state banks have halted business with North Korea's Foreign Trade Bank – signs that Beijing is getting serious about enforcing sanctions.
"The North Korean side has been feeling China's pressure," said Ma Xiaojun, a North Korea watcher at the Central Party School, a think tank for the leadership in Beijing.
"Our policies and stance have tended to be tougher and more clearly express our unhappiness and displeasure," said Ma. He added, quoting President Xi, "causing trouble on China's doorstep is not right, and China will not tolerate it."
Choe's priority is to mend ties, Ma said. Immediately upon landing in Beijing, Choe went to see Wang Jiarui, head of the Chinese leadership's international affairs office and long the point man for China's dealings with Pyongyang.
The North's official Korean Central News Agency said the two sides "exchanged views on matters of further improving the bilateral friendly relations at a new, higher stage."
China is impoverished North Korea's economic and diplomatic lifeline, providing nearly all of its fuel and most of its trade. China accounted for 89 percent of North Korea's exports and imports in 2011, according to the most recent figures available from Korea Trade-Investment Promotion Agency in Seoul, South Korea, which collects North Korean trade data.
China and North Korea are jointly developing two special economic zones: Rason on the Korean Peninsula's northeastern tip and Hwanggumphyong, an island in the Yalu River on North Korea's western border.
Chinese Foreign Ministry spokesman Hong Lei reiterated Wednesday that Beijing is committed to seeing North Korea denuclearize while maintaining regional stability – a catchphrase for continued Chinese support for Pyongyang.
Last week, a Japanese envoy traveled to Pyongyang for ongoing discussions about the decades-old abductions of its citizens by North Korea. After the envoy's return, Prime Minister Shinzo Abe said he would be open to holding a summit with Kim Jong Un if it would lead to a breakthrough. The issue is of great importance to Japanese, though when it returned five abduction victims in 2002, North Korea said there were no more living abductees.
Other countries are worried about focusing on Japanese abductions. Glyn Davies, the U.S. special representative for North Korea policy, warned North Korea might be trying to use talks with Japan to drive a wedge between the policies of Tokyo, Washington and Seoul.
During a summit with U.S. President Barack Obama this month, South Korean President Park Geun-hye laid out her policy of building trust with North Korea while remaining firm against provocations. Her office said she may travel to China next month.
In a sign that tensions have eased somewhat, the U.S. Air Force launched an unarmed Minuteman 3 ballistic missile in California on Wednesday, a month after postponing the test flight to avoid it being misconstrued by North Korea during the high tensions.
China wants security assurances that North Korea will act with less belligerence and make efforts to ease tensions, said Daniel Pinkston, an expert on North Korea with the International Crisis Group think tank who is based in Seoul, South Korea.
Because Choe has high-level military and ruling party positions, he can cover a variety of topics and likely will discuss security, normalization of economic ties and possible requests for aid when he meets with Chinese officials, Pinkston said.
Choe is a longtime Kim family friend who often is pictured standing next to the leader, along with Jang Song Thaek, Kim Jong Un's uncle. Jang, a top official now in charge of overseeing the push to expand North Korea's sports industry, visited China in August last year but was not in Wednesday's delegation.
Choe may also try to explain North Korea's recent military moves, including short-range projectile launches off the east coast, said Lee Ji-sue, a North Korea specialist and professor at Myongji University in Seoul.
He may also be paving the way for a visit by Kim Jong Un, who has not been to Beijing since taking power following the December 2011 death of his father, Kim Jong Il. The elder Kim visited China in August 2011.
Meanwhile, among the North Korean officials who went to the tarmac Wednesday to see Choe off was Gen. Kim Kyok Sik, North Korea's newly named chief of the armed forces.
Kim is believed to be commander of the North Korean battalions Seoul accuses of orchestrating two attacks in 2010 that killed 50 South Koreans.
Kim Kyok Sik had served as defense minister until being replaced recently by a little-known general, Jang Jong Nam, in one of several military reshuffles that have taken place since Kim Jong Un took power.
Kim's appointment to head troops suggests North Korea will maintain its hard line toward South Korea, said Han Yong-sup, a professor at Korea National Defense University in Seoul.
Associated Press writers Kim Kwang Hyon in Pyongyang; Sam Kim, Youkyung Lee and Hyung-jin Kim in Seoul, South Korea; Charles Hutzler in Beijing; and Eric Talmadge in Tokyo contributed to this report.
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In this undated image made from KRT video, North Korea's new young leader Kim Jong Un rides a horse at an undisclosed place in North Korea, aired Sunday, Jan. 8, 2012. (AP Photo/KRT via APTN)
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In this undated image made from KRT video, North Korea's new young leader Kim Jong Un appears from a military vehicle at an undisclosed place in North Korea, aired Sunday, Jan. 8, 2012. Kim Jong Un, who was named "supreme leader" of North Korea's people, ruling Workers' Party and military following the death last month of his father, Kim Jong Il, was shown observing firing exercises and posing for photographs with soldiers in footage that was shot before his father's death and aired as a documentary Sunday. (AP Photo/KRT via APTN) TV OUT, NORTH KOREA OUT
In this Oct. 10, 2010 file photo Kim Jong Un, right, along with his father and North Korea leader Kim Jong Il, left, attends a massive military parade marking the 65th anniversary of the ruling Workers' Party in Pyongyang, North Korea. (AP Photo/Kyodo News, File)
North Korea's next leader, Kim Jong Un, front center, salutes beside the hearse carrying the body of his late father and North Korean leader Kim Jong Il during the funeral procession in Pyongyang, North Korea Wednesday Dec. 28, 2011. (AP Photo/Kyodo News)
North Korean leader Kim Jong Un speaks to tens of thousands before a mass military parade in Pyongyang's Kim Il Sung Square to celebrate 100 years since the birth of the late North Korean founder Kim Il Sung on Sunday, April 15, 2012. (AP Photo/David Guttenfelder)
North Korean leader Kim Jong Un arrives for the unveiling ceremony for statues of late leaders Kim Jong Il and Kim Il Sung on Mansudae in Pyongyang, North Korea, Friday, April 13, 2012. (AP Photo/Ng Han Guan)
In this Wednesday, July 25, 2012 photo released by the Korean Central News Agency (KCNA) and distributed in Tokyo by the Korea News Service Thursday, July 26, 2012, North Korean leader Kim Jong Un, center, accompanied by his wife Ri Sol Ju, right, waves to the crowd as they inspect the Rungna People's Pleasure Ground in Pyongyang. (AP Photo/Korean Central News Agency via Korea News Service)
In this undated file photo released by the Korean Central News Agency and distributed in Tokyo by the Korea News Service, North Korean leader Kim Jong Un, third from right, looks at food items as he inspects a military unit at an undisclosed location in North Korea. (AP Photo/KCNA via KNS, File)
This picture taken by North Korea's official Korean Central News Agency (KCNA) on December 12, 2012 shows North Korean leader Kim Jong-Un (lower L) celebrating with staffs from the satellite control center during the launch of the Unha-3 rocket, carrying the satellite Kwangmyongsong-3, at the general satellite control and command center in Pyongyang. (KNS/AFP/Getty Images)
In this Feb. 28, 2013 file photo, North Korean leader Kim Jong Un, left, and former NBA star Dennis Rodman watch North Korean and U.S. players in an exhibition basketball game at an arena in Pyongyang, North Korea. (AP Photo/VICE Media, Jason Mojica, File)
In this March 7, 2013 file photo released by the Korean Central News Agency (KCNA) and distributed by the Korea News Service, North Korean leader Kim Jong Un uses a pair of binoculars to look at the South's territory from an observation post at the military unit on Jangjae islet, located in the southernmost part of the southwestern sector of North Korea's border with South Korea. (AP Photo/KCNA via KNS, File)
In this March 11, 2013 file photo released by the Korean Central News Agency (KCNA) and distributed by the Korea News Service, North Korean leader Kim Jong Un rides on a boat, heading for the Wolnae Islet Defense Detachment, North Korea, near the western sea border with South Korea. (AP Photo/KCNA via KNS, File)