North Korean leader Kim Jong Un wrapped up a rare trip abroad Sunday, meeting with students and visiting an aquarium in Russia’s far east, a day after holding talks with Russia’s defense chief and discussing “practical issues” for deepening military cooperation with Moscow.

The North Korean leader was given a red-carpet farewell ceremony late Sunday afternoon and departed via his bulletproof luxury train from a rail station in the city of Vladivostok, Russia's RIA Novosti news agency reported.

The return trek — over 200 kilometers in total — was expected to take several hours for Kim's plodding armored train.