China–North Korea relations

The bilateral relations between the People's Republic of China (PRC) and the Democratic People's Republic of Korea (DPRK) (, 조중 관계) have been generally friendly, although they have been somewhat strained in recent years because of North Korea's nuclear program. They have a close special relationship and China is often considered to be North Korea's closest ally. China and North Korea have a mutual aid and co-operation treaty, signed in 1961, which is currently the only defense treaty China has with any nation.

China maintains an embassy in the North Korean capital of Pyongyang and a consulate general in Chongjin. The embassy of North Korea in China is located in Beijing's Chaoyang District, while a consulate general is in Shenyang. North Korea has adhered to the One China principle, where it recognizes the PRC as the only representative of "China", and does not recognize the legitimacy of the Republic of China (ROC), nor Taiwanese independence.

China and North Korea have, in the past, enjoyed close diplomatic relations. Both countries established diplomatic relations on 6 October 1949, 5 days after the declaration of the PRC, and China has sent troops to aid North Korea during the Korean War. North Korea attempted to not take sides during the Sino-Soviet split, though relations deteriorated during the Cultural Revolution.

In the 21st century, China–North Korea relations declined due to various reasons such as the growing concern in China over issues such as North Korea's impoundment of Chinese fishing boats and North Korea's nuclear weapons program. China abstained during a United Nations Security Council vote about sanctions on North Korea, leading it to be approved. Relations have again been increasingly close since 2018, with North Korean leader Kim Jong Un making multiple trips to Beijing to meet Chinese Communist Party general secretary and president Xi Jinping, who himself visited Pyongyang in June 2019.

History
Paramount leaders of China and Supreme leaders of North Korea since 1950

Background
Relations between China and North Korea began in the 1940s before the two even became formal states. After World War II, after decades of Japanese occupation, the northern half of Korea was placed under Soviet administration. Then, on 9 September 1948, the DPRK (Democratic People's Republic of Korea) was officially established. The PRC (the People's Republic of China) was created a year later when the Chinese Communist Party (CCP) won the Chinese Civil War on 1 October 1949.

The Chinese Civil War
During the Chinese Civil War, the CCP was struggling to make gains in South Manchuria. Due to North Korea's proximity to South Manchuria, the CCP leant on the DPRK for support. After military failures in Andong and Tonghua, 15,000 wounded Chinese Communist soldiers were taken in by North Korean families. When the CCP had to withdraw, they left vital supplies with the Koreans. Between late 1947 and early 1948, the Koreans helped transport more than 520,000 tons of goods to the CCP, even suspending passenger services to ensure their arrival.

The People's Republic of China and the Democratic People's Republic of Korea exchanged diplomatic recognition on 6 October 1949 with the PRC recognizing the DPRK as the sole legitimate authority of Korea.

Korean War
In April 1950, Stalin put pressure on Kim Il-Sung to gain Chinese approval for an invasion of South Korea, stating:

"“If you should get kicked in the teeth, I shall not lift a finger. You have to ask Mao for all the help.”"

Even though the Koreans saw American intervention as unlikely, Mao ensured a North Korean diplomat that, if the US entered the conflict, China would send assistance.

On 25 June 1950, the North invaded the South. Within days, American forces were sent to the peninsula. Shortly after, the Soviet Ambassador to China reported in a telegram to Stalin that the Chinese felt frustrated that the "Korean comrades [had] underestimated the possibility of American armed intervention".

At the time, the People's Republic of China (PRC) was in a difficult position. It was barely one year old, and the majority of its military forces were in south China, opposite Taiwan, over 1,000 miles away. As soon as North Korea invaded, the United States deployed forces not only to Korea but also to the Taiwan strait. Therefore, the PRC faced potential conflicts with America on two fronts.

Despite this, it was clear that China–North Korea border assumed great strategic value for the Chinese Communist Party: the Empire of Japan had invaded China through Korea twice in the First Sino-Japanese War and during the Japanese invasion of Manchuria, and it was feared the US could do the same. Supporting them militarily could also allow the CCP to boost their influence within North Korea and help direct the development of Korean communism.

At a meeting with the Politburo on 4 August 1950, Mao said,

"'If the American imperialists are victorious, they will become dizzy with success, and then be in a position to threaten us. We have to help [North] Korea; we have to assist them.'"

The next day, Mao gave the military a deadline: be ready for combat in Korea "by the end of the month". However, more time was needed to prepare, and the date was delayed.

On 30 September, US forces entered North Korea, representing a significant turning point in the war. On 1 October, Kim Il-Sung held an emergency meeting with the Chinese ambassador to the North, Ni Zhiliang, petitioning for their urgent entry into the conflict. On 19 October 1950, Chinese forces crossed into North Korea. The same day, Pyongyang fell to the Americans.

China sent over one million Chinese People's Volunteers to aid in the war effort. In addition to dispatching military personnel, China also received North Korean refugees and students and provided economic aid during the war.

Then, Douglas MacArthur defied US and UN orders and pushed towards the Yalu River, which enlarged the conflict when Chinese forces fought back and caught the UN forces by surprise, resulting them to retreat back to the 38th parallel, eventually turning into a stalemate and also the current boundary between North Korea and South Korea.

Aftermath
Following the signing of the Korean War Armistice in 1953, China, along with members of the Eastern Bloc led by the Soviet Union, provided extensive economic assistance to Pyongyang to support the reconstruction and economic development of North Korea. After the war China continued to station 300,000 troops in North Korea for five years. National Defense Minister and commander of the Chinese forces in Korea Peng Dehuai urged Mao to remove Kim from power, but he was sidelined after he criticized the Great Leap Forward.

The war had allowed the newly established PRC to demonstrate that they will not bow to American military might, and will intervene when needed. This meant that their relationship with North Korea became an important element of China-U.S. relations.

Relations during the Cold War
In 1956, at the 2nd Plenary Session of the 3rd Central Committee, leading pro-China Korean figures known as the Yan'an faction attempted to remove Kim Il Sung from power with the support of China and the Soviet Union, but failed. This incident has become known as the August Faction Incident and forms the historical basis for North Korean fears of Chinese interference. At the same time, China tried to maintain good relations with North Korea because of the Sino-Soviet split and de-Stalinization.

In 1959, the PRC & the DPRK signed a nuclear co-operation agreement.

1960s
Initially, the 1960s began with the two nations strengthening their alliance. As Sino-Soviet relations turned sour, the DPRK & the PRC gradually warmed to each other, as they were closer ideologically than their eastern European counterparts, and shared a common enemy: the United States. In 1961, the two countries signed the Sino-North Korean Mutual Aid and Cooperation Friendship Treaty, whereby China pledged to immediately render military and other assistance by all means to its ally against any outside attack. This agreement was renewed in 1981, 2001 and 2021.

However, the 1960s have also been characterized as a "contentious" period in China-North Korean relations. After the PRC detonated their first nuclear device in October 1964, a North Korean delegation visited Beijing to seek assistance with their own nuclear programme, but they were rebuffed and returned to Pyongyang empty-handed. Then, the Workers' Party of Korea criticized the Cultural Revolution and described Mao Zedong as “an old fool who has gone out of his mind.” China recalled its ambassador from Pyongyang in October 1966, and the Red Guard criticized North Korea as being "revisionist" in the Dongfanghong newspaper. Tensions between Chinese Red Guards and North Korea led to some armed clashes in 1969, with ethnic Koreans in Yanbian massacred by Red Guards.

1970s
In the 1970s, relations between China and North Korea improved. In April 1970, Chinese premier Zhou Enlai traveled to Pyongyang to apologize for their treatment of North Korea. When speaking about the two nations' "blood-cemented" friendship, Zhou stated, "China and Korea are neighbors as closely related as lips and teeth".

In addition, Japan's growing alliance with the U.S. threatened both China and the DRPK, bringing them both closer together. In November 1969, the U.S. and Japan released a joint statement stating America's hope for Japan to become a key ally in Asia, along with emphasizing the importance of Taiwan & South Korea in Japanese national security. Shortly after, in June 1970, the U.S.-Japan Security Treaty was extended, allowing American military bases to continue operation in Japan, and ensuring that they would both act to defend each other in the event of a war. This encroaching Japanese influence compelled the PRC to declare their approval of North Korea's "eight-point program for the peaceful unification of Korea" and to advocate for the disbandment of the UN Commission for the Unification of Korea in 1972.

In the 1970s, the North's aims to unify the peninsula were reignited when they saw the success of the Communist Party of Vietnam in reunifying their nation. In April 1975, Kim Il-Sung visited Beijing, where a second Korean war was discussed. China, however, did not approve of any military action which could aggravate relations with the United States, and urged the Koreans to find peaceful means of reunification.

While the 1970s largely represented the growing solidarity between People's Republic of China & the Democratic People's Republic of Korea, there were still tensions. For example, Deng Xiaoping urged political and economic reforms after the Chinese economic reform and criticized the North Korean cult of personality and provocative actions such as the Rangoon bombing.

1980s
The 1980s brought a turning point for North Korea's relationship with China. First formulated by Deng Xiaoping in 1978, in the 80s China's Open Door Policy became a reality, allowing trade with the West to boom on an unprecedented level. The Open Door Policy placed North Korea in an insecure position, as they perceived the policy as a betrayal of fundamental communist principles, whilst simultaneously diminishing North Korea's importance as a trade partner.

North Korea's vulnerability was enhanced further as the PRC began to strengthen ties with South Korea. In collaboration with South Korean company Daewoo, China hoped to start the Fuzhou Refrigerator Company as a joint economic venture between the two nations. The North objected fiercely to this partnership, causing China to postpone the project. However, China still pushed on, with production lines opening in June 1988. As a result of growing tensions & China's open door, bilateral trade between North Korea & the PRC declined 14% between 1989 and 1990.

Post-Cold War era
After the fall of the Soviet bloc, China became North Korea's biggest trading partner, but the alliance faced fresh challenges. In 1992, DPRK-PRC relations worsened after China increased trade relations with North Korea's rival South Korea in the 1980s, culminating with the full normalization of diplomatic relations in 1992. The North Koreans perceived this as a betrayal of the 'One Korea' policy, as they were no longer recognized by China as the only legitimate government in the peninsula. China subsequently stopped selling goods to North Korea at discounted "friendship prices" and providing interest-free loans, leading to the decline of DPRK-PRC trade in the 1990s.

However, it began subsidizing trade to North Korea again in order to prevent a refugee crisis in Northeast China during the North Korean famine. From 1994 to 1995, North Korea received around 500,000 tons of grain, 1.3 tons of oil, and 23 million tons of coal from their northern neighbour. Almost half of this was free of charge and the rest was sold at friendship prices of less than 50% the market rate.

China facilitated key negotiations between the North & the South. In June 2000, leaders from the two Koreas met for the first time since the Korean War, and beforehand Kim Jong-il took a trip to Beijing to seek support and advice. China also encouraged amnesty between the two nations, discouraging military action. During a visit to Seoul in October 2000, Chinese Premier Zhu Rongji advocated for the "peaceful reunification" of the Korean peninsula. A few months later, in January 2001, President Jiang Zemin reiterated China's aims to facilitate Korean unification through peaceful means.

On 1 January 2009, Chinese paramount leader Hu Jintao and North Korean leader Kim Jong Il exchanged greetings and declared 2009 as the "year of China–DPRK friendship," marking 60 years of diplomatic relations between the two countries. In March 2010, Kim visited Beijing to meet with the Politburo Standing Committee of the Chinese Communist Party. He returned to Pyongyang empty-handed, without assurances of additional economic relief.

North Korea's economic dependence on China grew substantially. In 2000, China represented 24.8% of North Korea's foreign trade but within 10 years this figure ballooned to over 80%.

In August 2012, Jang Song-thaek, uncle of Kim Jong Un, met Hu Jintao, General Secretary of the Chinese Communist Party in Beijing. It has since been widely reported that during their meeting, Jang told Hu Jintao he wished to replace Kim Jong Un with his brother Kim Jong-nam. The meeting was allegedly taped by Zhou Yongkang, then secretary of the Central Political and Legal Affairs Commission, who informed Kim Jong Un of the plot. In December 2013, Jang was executed for treason while in July 2014 Zhou was publicly put under investigation for corruption and other crimes and was arrested in December 2014. These events are said to have marked the beginning of Kim Jong Un's distrust of China, since they had failed to inform him of a plot against his rule, while China took a dislike to Kim for executing their trusted intermediary.

On 5 May 2013, North Korea "grabbed," according to Jiang Yaxian, a Chinese government official, another Chinese fishing boat in a series of impounding Chinese fishing boats. "North Korea was demanding 600,000 yuan ($97,600) for its safe return, along with its 16 crew." According to a December 2014 article in The New York Times, relations had reached a low point.

In March 2016 the North Korean leader Kim Jong Un visited a missile factory, which China strongly condemned, in a report by the state newspaper the People's Daily revealed that the North Korean politics causes instability on the Korean Peninsula and is comparable to the situation in Syria.

The involvement of the United States in the peninsula's affairs in April–May 2017 presented a major issue for China-American relations in organiser Li Xiaolin's preparations for Xi's visit to the US.

Nuclear weapons program
Since 2003, China has been a key participant in six-party talks aimed at resolving the issue of North Korea's nuclear weapons programme.

China condemned the 2006 North Korean nuclear test and approved United Nations Security Council Resolution 1718 (2006) and United Nations Security Council Resolution 1874 (2009) expanding sanctions against North Korea. However, the extent to which China they implemented sanctions in the early 2000s is uncertain. While they enforced sanctions against goods directly associated with their nuclear programmes, they were more lenient on dual use products and showed barely any restraint regarding the import of banned luxury goods.

President Hu Jintao sent Foreign Minister Li Zhaoxing to Pyongyang to negotiate with Kim Jong Il to halt the nuclear program. According to U.S. National Security Council Director for Asian Affairs Victor Cha, Hu Jintao and the Chinese government were genuinely outraged by the test because North Korea had led it to believe that it did not have nuclear weapons and ignored its advice against building them. China was also concerned that the Liberal Democratic Party government of Japan would respond by expanding its military.

The Foreign Minister of the People's Republic of China Yang Jiechi said that China "resolutely" opposed the 2013 North Korean nuclear test conducted by North Korea. The North Korean ambassador to China, Ji Jae-ryong, was personally informed of this position on 12 February 2013 in a meeting with Yang Jiechi.

In 2016, right after the North Korean nuclear test in January tensions between China and North Korea have further grown, the reaction of China was, "We strongly urge the DPRK side to remain committed to its denuclearization commitment, and stop taking any actions that would make the situation worse," spokesperson Hua Chunying said. On 24 February 2016 the United States and China introduced new sanctions against the North Korean regime conducted within the United Nations context.

The Times of India reported that the then British Foreign Secretary Boris Johnson saying at a dinner to mark India's independence that the Chinese control 90% of North Korea's trade and it is in the Chinese government's hands to exercise economic pressure on Kim Jong Un to achieve the diplomatic resolution needed to de-escalate tensions in the region.

The United States has sanctioned many Chinese companies for violating North Korean sanctions, possibly aiding their nuclear program.

2017 decline in relations
Due to Chinese support for sanctions against North Korea, relations in 2017 took a negative turn with North Korean state media attacking China directly on at least three occasions.

In February 2017, after China halted imports of coal from North Korea, the Korean Central News Agency (KCNA) said, "this country [China], styling itself a big power, is dancing to the tune of the US while defending its mean behaviour with such excuses that it was meant not to have a negative impact on the living of the people in the DPRK but to check its nuclear program".

In May 2017, KCNA made an unprecedented criticism of China, saying "a string of absurd and reckless remarks are now heard from China every day only to render the present bad situation tenser" and that "China had better ponder over the grave consequences to be entailed by its reckless act of chopping down the pillar of the DPRK-China relations". Accusing China of "big-power chauvinism", KCNA said Chinese support for sanctions against North Korea were "an undisguised threat to an honest-minded neighboring country which has a long history and tradition of friendship" and that "The DPRK will never beg for the maintenance of friendship with China".

In September 2017, KCNA slammed negative editorials by the People's Daily and Global Times, saying "some media of China are seriously hurting the line and social system of the DPRK and threatening the DPRK" and calling them "the dirty excrement of the reactionaries of history" who "spouted such extremely ill-boding words".

In February 2018, the KCNA again criticized Chinese media. According to KCNA, China Central Television "seriously spoiled the atmosphere of the feast by publishing presumptuous comments of individual experts" and the Global Times was condemned for "the behavior of scattering ashes on other's happy day as they bring the denuclearization issue".

Post-2018 improvement in relations
In March 2018, North Korean leader Kim Jong Un met with Chinese leader Xi Jinping for the first time in Beijing. Xinhua News Agency reported that the North Korean leader's trip lasted four days. Kim and his wife Ri Sol-ju were met with honour guards and a lavish banquet hosted by Xi Jinping.

Xi was likewise received in the same-fashion when he visited Pyongyang in June 2019 on two-day state visit, the first of such since Hu Jintao's 2006 visit. In a North Korean mass games that Xi attended, he was depicted inside a gold-framed circle surrounded by red — the same style previously used to depict Kim Jong Un's father, Kim Jong Il, and grandfather, Kim Il Sung. It is also the first time a visit by a Chinese leader to North Korea has been called a "state visit" by the Chinese government.

In July 2019, North Korea was one of the 50 countries which signed a letter defending Xinjiang internment camps and praising "China's remarkable achievements in the field of human rights in Xinjiang." North Korea has also defended China's position in the 2019–20 Hong Kong protests, with North Korean Foreign Minister Ri Yong-ho saying that "North Korea fully supports the stand and measures of China to defend the sovereignty, security and territorial integrity of the country and safeguard the prosperity and stability of Hong Kong, and concerns about foreign forces interference in Hong Kong issue." During an official visit to North Korea in September 2019, foreign minister Wang Yi said that "China will always stand on the road as comrades and friends" of North Korea.

In October 2019, the two countries celebrated the 70th anniversary of the establishment of relations, with KCNA saying that their "invincible friendship will be immortal on the road of accomplishing the cause of socialism".

In June 2020, North Korea was one of 53 countries that backed the Hong Kong national security law at the United Nations.

After the 20th CCP National Congress in 2022, Rodong Sinmun, official newspaper of the ruling Workers' Party of Korea, wrote a long editorial praising Xi, titling both Kim and Xi Suryong (수령), a title historically reserved for North Korea's founder Kim Il Sung.

In July 2023, CCP Politburo member and first vice chairman of the Standing Committee of the National People's Congress Li Hongzhong visited North Korea to attend the 70th Day of Victory in the Great Fatherland Liberation War, the first trip by a high-ranking Chinese official since the beginning of the COVID-19 pandemic. During the visit, Li met with Kim Jong Un, where he gave a letter from Xi. Li also attended a North Korean military parade together with Kim and Russian defense minister Sergei Shoigu.

Border
China and North Korea share a 1,416 km long land border that corresponds almost entirely to the course of the Yalu and Tumen rivers.

The two countries signed a border treaty in 1962 to resolve their un-demarcated land border. China received 40% of the disputed crater lake on Paektu Mountain (known as Changbai Mountain in China), while North Korea held the remaining land.

In the 1950s and 1960s, many ethnic Koreans in Northeast China crossed the border into North Korea to escape economic hardship and famine in China. In recent years, the flow of refugees has reversed, with a considerable number of North Koreans fleeing to China. Much of China's trade with North Korea goes through the port of Dandong on the Yalu River.

In February 1997, tourist access to the bridge over the Tumen at Wonjong-Quanhe was allowed.

In May 2012, China and North Korea signed an agreement on the construction and management of the cross-border bridge between Manpo in the Jagang Province of North Korea and Jian in China.

In 2015, a single rogue North Korean soldier killed four ethnic Korean citizens of China who lived along the border of China with North Korea.

In April 2019, both countries opened the bridge connecting the cities of Ji'an, Jilin and Manpo after three years of construction.

Refugees
Many North Korean defectors travel through their 1,416-km-long border with China rather than through the de facto Demilitarized Zone (DMZ) to reach South Korea. In 1982, China joined both the UN Convention Relating to the Status of Refugees and the Protocols Relating to the Status of Refugees. China's membership in these two organizations requires them to provide personal rights (economic and social rights presented in the CSR and PRSR) to any refugee entering their borders. However, China does not recognize North Korean defectors as refugees but rather classifies them as ‘economic migrants’ referring to their immigration due to food and financial struggles. Under the Refugee Conventions and Protocols, this would not classify North Korean defectors as refugees, but rather, border crossers, which has sparked debate. According to Korea scholar Andrei Lankov, the vast majority of refugees would first move to China to earn money, and later decide to continue on to South Korea. South Korean documentarian Cho Cheon-hyeon reported in February 2021 that there were more North Koreans in China who preferred to stay there or return to the North instead of going to South Korea.

In 1986 China and North Korea intensified their monitoring of illegal border crossers, or North Korean defectors through the Mutual Cooperation Protocols for the National Security and Maintenance of Social Order in the Border Regions. This required China to detain North Korean defectors and provide the North Korean government with information on who would defect. The issue is that repatriating defectors as illegal border crossers defies the Forced Repatriation Prohibition Principle (part of international law according to South Korean legal experts). The Chinese government most commonly forces defectors to return to North Korea if they are caught but in some instances has allowed them to pass through China into a third country.

Tensions regarding migrants crossing the Sino-North Korean border flared up in 2002 with a string of incidents of North Korean defectors reaching Japanese, American, Canadian, and South Korean consulates in the Chinese city of Shenyang and embassies in the capital of Beijing. Incidents in which Chinese state forces physically dragged defectors who were seeking asylum from the front steps of Japanese and South Korean consulates received international media attention and caused diplomatic rifts between involved countries. In one such case, a North Korean defector father and his 13-year-old son were separated as Chinese police pushed through a human wall of South Korean diplomats in an attempt to seize the migrants, ending in the father's capture and son's placement within the South Korean embassy in Beijing. In most cases of seizure, defectors are taken into custody by Chinese forces in order to be repatriated back to North Korea. Once in North Korea, many defectors are placed in penal camps which are known to be relatively liberal but still deadly.

Economic relations
China's economic assistance to North Korea accounts for about half of all Chinese foreign aid. Beijing provides the aid directly to Pyongyang, thereby enabling it to bypass the United Nations.

During the period of severe food shortage between 1996 and 1998, Beijing provided unconditional food aid to North Korea.

Trade
China is North Korea's largest trade partner, while North Korea itself ranks relatively low as a source of imports to China. While North Korea imports a wide range of products from household items to strategic goods like oil and machinery, their exports to China are limited to anthracite, iron ore, and marine products due to their meagre industrial growth. North Korea is dependent on trade and aid from China, although international sanctions against North Korea have decreased overall official volume of trade. Between 2000 and 2015, trade between the two countries grew over ten-fold, reaching a peak of $6.86 billion in 2014. China is a major investor in North Korea's mining and metallurgical industries including steel and iron, copper, coal, and rare-earth minerals. PRC-DPRK trade also provides an important source of revenue to Jilin and Liaoning Provinces, which have suffered deindustrialization since the 1970s. In return, North Korea is dependent on China for imports of food and fuel, particularly since the end of South Korea's Sunshine Policy in 2008.

In February 2017, China restricted all coal imports from North Korea until 2018. In 2016, coal briquettes had been the single largest good exported by North Korea, accounting for 46% of its trade with China. China has said this was in line with the UN sanctions against North Korea, but it is speculated that this occurred because of a mix of events, including recent nuclear tests, the suspected assassination of Kim Jong-nam, brother of ruler Kim Jong Un, and pressure on China from the rest of the world and especially the United States. However, despite this, North Korea has been reported to evade sanctions and continue to sell coal to China through a loophole. On 28 September 2017, in response to new UN Security Council sanctions over a nuclear test earlier in the month, China ordered all North Korean companies operating in China to cease operations within 120 days.

By January 2018 customs statistics showed that trade between the two countries had fallen to a historic low, although volume again increased by 15.4% to $1.25 billion in the first half of 2019. China closed its border in late January 2020 due to the COVID-19 pandemic, and trade between the two countries nearly halted, with North Korean imports from and exports to China both down by over 90% year-over-year in March.

In 2020, trade fell by more than 80% due to COVID-19 pandemic. Chinese-North Korean trade was severely affected by the pandemic in 2020 onwards. Chinese-North Korean trade equaled US$318 million in 2021, compared to the US$539 million in 2020 and US$2.78 billion in 2019. Scholars have hinted that the prolonged COVID-19 restrictions from both North Korea and China have aided in the rapid decrease of trade revenue. Furthermore, there has been a lack of raw materials in North Korea, leading to less work, and thus less workers. This lack of raw materials can be attributed to China's lockdowns and restrictions during COVID-19. North Korea, due to their Enterprise Law in 2013 and 2015 allowed companies more freedom to control their own production, leading to an influx in Chinese raw materials and boosting bilateral trade.

North Korea had been one of the first countries to close their borders to China in order to avoid the virus, yet China is working to repair its ties with North Korea regardless. South Korea's central bank, the Bank of Korea, approximates that North Korea's economy shrank by around 4.5 percent. China and North Korea maintained informal trade, with China violating UN sanctions on North Korea. These sanctions include the illicit ship to ship transfers of 1.6 million barrels of refined oil to North Korea although the UN imposed a limit of 5,000 barrels per year. In September 2021, reports indicated that the Chinese government continued to smuggle imports of North Korean coal due to energy shortage issues throughout China. China has attempted to decrease the severity of sanctions against North Korean goods to address trade issues by appealing to the United Nations Security Council in November of the same year. In 2022, exports from China to North Korea increased by 247.5% year-on-year to $894 million, while total trade increased 226% from a year earlier to $1.03 billion. By 2023, North Korea's trade with China recovered to $2.3 billion, with imports exceeding $2 billion and exports at $292 million.

Banking
On 7 May 2013, Bank of China, China's biggest foreign exchange bank, joined other international banks in closing the accounts of North Korea's Foreign Trade Bank, its main foreign exchange bank. Although neither entity stated reasons for the closure, it is widely assumed that it was in response to sanctions placed against Bank of China by the United States for its alleged assistance in financing the North Korean nuclear weapons program.

Investments
In 2012, a $45 million investment by China's Haicheng Xiyang Group into an iron-ore powder processing plant failed under what the Chinese called "a nightmare". On 21 February 2016 China quietly ended financial support of North Korea without any media publicity. It is reported to be due to the fallout of relations between the two governments.

In July 2019, Washington Post reported that Huawei "secretly helped" North Korea to build and maintain its commercial wireless network in conjunction with Chinese state-owned enterprise Panda International Information Technology Co.

Military relations
China assisted North Korea during the Korean War (1950–53) against South Korean and UN forces on the Korean peninsula. Although China itself remained neutral, three million Chinese soldiers participated in the conflict as part of the People's Volunteer Army fighting alongside the Korean People's Army. As many as 180,000 were killed.

Since the end of the Korean War, the two states have closely cooperated in security and defense issues. The two countries signed the mutual aid and co-operation treaty in 1961, which is currently the only defense treaty either country has with any nation. In 1975, Kim Il Sung visited Beijing in a failed attempt to solicit support from China for a military invasion of South Korea. On 23 November 2009, Chinese Defense Minister Liang Guanglie visited Pyongyang, the first defense chief to visit since 2006.

In August 2019, director of the General Political Bureau of the KPA Kim Su Gil visited Beijing to meet with Zhang Youxia. Zhang told Kim that the delegation's visit as was of “crucial significance in bilateral exchange.“

Inter-visits by leaders
Kim Il-Sung made a secret visit to Beijing in May 1950 and met with CCP leaders for the first time on 13 May. No official records of the meeting survive but the Chinese learned that North Korea planned to invade Korea. Afterward, Mao demanded an "urgent answer" and "personal clarifications" from Stalin regarding Soviet support and emphasized that the CCP needed to be involved in the decision making; the request was relayed through N. V. Roshchin, the Soviet ambassador to China. Some historians believe that Mao needed reassurances from Stalin because he lacked confidence in Kim.

According to Nikita Khrushchev's memoirs, China approved North Korea's plans. In other sources, Mao did not approve the plan in advance, and was concerned that it would provoke an American response and that China might become involved in the conflict.

Kim met with Mao in 1975 after the end of the Vietnam War. According to Chinese historian Shen Zhihua, Kim was interested in another war to conquer South Korea after the Communist victory in Vietnam, but Mao refused to discuss the matter. According to Japanese historian Masao Okonogi, the lack of Chinese support caused North Korea to adopt an independent approach to national defence and develop nuclear weapons.

Deng Xiaoping attended North Korea's 30th anniversary celebrations in 1978 in his official capacities as the First Vice Premier of the State Council and the Vice Chairman of the Chinese Communist Party.

Poll
According to a 2014 BBC World Service Poll, 20% of Chinese people view North Korea's influence positively, with 46% expressing a negative view.