North Korean Patriotic Song - Train of Reunification Runs! (Pochonbo Electronic Ensemble)
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The basic story is about this 'Unification Train', loaded with goods (nylon, silk...) and machinery (farming equipment, tractors...) running through South Ko...

The reunification train runs to Busan Vladivostok.

Bulletproof, Slow and Full of Wine: Kim Jong-un’s Mystery Train. Heading to Russia to meet with President Vladimir Putin, the North Korean leader chose to travel by rail, on a train with some unusual features.

What are the unusual features? (Bad guesses only)