What is a great power? I think it has already become tangible at this moment.

A country that relies entirely on imports for resources will always be held by the throat.
As soon as a war breaks out, there's no need to fight you directly; just block your resources, and the domestic economy will collapse in no time. Internal unrest will then begin to sprout.
South Korea, Japan, Europe.
If Iran can hold on for a long period of time,
that would be a disaster for these countries.
Dongda is awesome!