On a Tuesday with no summit scheduled, no multilateral forum convening, and no state anniversary to mark, North Korea's Foreign Minister Choe Son Hui landed in Moscow. The absence of any obvious diplomatic pretext was itself the story. When Pyongyang sends its most senior foreign-policy official to Russia without a public explanation, analysts have learned to read the silence carefully. The visit has prompted immediate speculation that Choe is laying the groundwork for a personal trip to Russia by Kim Jong Un himself.

Such preparatory missions are a well-established feature of North Korean diplomacy: senior officials travel ahead of the leader to agree on protocol, security arrangements, and the substance of any joint statements. A Kim visit to Moscow would be his second meeting with President Vladimir Putin on Russian soil, following their encounter at the Vostochny Cosmodrome in September 2023, which alarmed Western governments and deepened fears of a military supply relationship between the two countries. That relationship has grown considerably more consequential since then. United States and South Korean officials have accused Pyongyang of supplying artillery shells and ballistic missiles to Russia for use in Ukraine, charges that both Moscow and Pyongyang deny.

North Korea, for its part, is widely believed to seek advanced military technology, satellite assistance, and economic relief in return. The partnership, whatever its precise terms, is no longer theoretical.