The Russian expansion model: they attack Ukraine, steal grain, pay with this grain for North Korean and Iranian weapons, attack again. The same with soldiers: they attack, forcibly conscript males from the occupied regions, attack again. It is a cancer tumor expansion model.
North Korea is ready to sign a weapons supply agreement with Russia, - Financial Times
According to the publication, in return, Moscow might offer grain, oil and military technology, as well as hard currency as payment. Russia could also be prevailed upon to provide North Korea with highly sensitive military technologies that would threaten its neighbours, notably South Korea and Japan.