China and North Korea mark 65 years of treaty as alliance remains strategically important
China and North Korea are marking the 65th anniversary of their Treaty of Friendship, Cooperation and Mutual Assistance, a pact that still defines one of Asia's most closely watched relationships. The anniversary comes as North Korean Premier Pak Thae Song makes a three-day visit to Beijing to commemorate the treaty. The visit highlights that, despite decades of strain and change, the alliance remains active and politically significant.
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The treaty was signed in Beijing on 11 July 1961 by then Chinese Premier Zhou Enlai and North Korean leader Kim Il Sung. It includes a mutual defence clause committing either side to assist the other if one comes under armed attack. That makes it China's only formal military alliance, giving the agreement a status that goes well beyond symbolism.
The arrangement has survived the Cold War, China's economic opening, the collapse of the Soviet Union and long-running tensions over North Korea's nuclear programme. The relationship is rooted in the Korean War, when United States-led forces advanced towards China's border in 1950 and Beijing sent hundreds of thousands of troops into North Korea. China described those troops as volunteers, but they fought under Chinese command and suffered heavy casualties.
That shared history remains central to the official narrative, and Chinese and North Korean leaders still describe the friendship as being "sealed in blood". The language reflects a relationship built on wartime memory as much as on present-day diplomacy. The anniversary also underlines the practical limits and strategic value of the partnership.
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China has become the world's second-largest economy, while North Korea remains isolated and heavily sanctioned. Even so, both sides appear to see value in keeping the relationship intact. For Beijing, the alliance helps preserve influence on the Korean Peninsula and maintain a buffer on its border.
For Pyongyang, China remains its most important external partner and a crucial diplomatic counterweight. The ties are also shaped by shared political outlooks. Both countries are socialist one-party states and both are deeply suspicious of Western power.
They oppose the presence of United States troops on the Korean Peninsula and accuse Washington of using alliances, sanctions and military pressure to contain states that reject its authority. At the same time, their systems and priorities are not identical, and China's embrace of foreign investment, private enterprise and global trade has widened the gap between the two countries over time. That divergence has not broken the alliance, but it has made it more complicated.
China has had to balance its treaty relationship with North Korea against its broader economic and diplomatic interests. North Korea, meanwhile, has continued to pursue its nuclear weapons programme, a source of repeated tension in the relationship. The fact that the treaty remains in force after 65 years suggests that both governments still judge the costs of rupture to be higher than the costs of continued cooperation.
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The current visit by Pak Thae Song shows that the treaty is still being used as a live instrument of diplomacy rather than a historical relic. It also comes at a time when regional security concerns remain high and the Korean Peninsula continues to be shaped by military rivalry and sanctions pressure. The anniversary offers both governments a chance to restate the value of the alliance while avoiding any suggestion that their interests are fully aligned.
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