You can't stop north korea/russia buying from the capitalist west (How do Russia get over a billion dollars worth of serialized/tracked aircraft parts to replen

You can't stop north korea/russia buying from the capitalist west (How do Russia get over a billion dollars worth of serialized/tracked aircraft parts to replenish their fleet this year? How do serialized/batch tracked parts end up underground when you track which airplane every part goes into?). It might be different for China, where instead of politicians/government people overlooking loopholes (because money must flow) China executes people for not following the rules.