<i>I realize N Korea is pretty isolated, but China shares technology with the country right?</i><p>Doubtful at this level. The North Korean missile systems it sold to Syria (and Iran) in the early 2010s were NK development of earlier Soviet systems[1].<p>[1] <a href="http:&#x2F;&#x2F;www.theguardian.com&#x2F;world&#x2F;2013&#x2F;jul&#x2F;18&#x2F;history-north-korea-arms-dealing" rel="nofollow">http:&#x2F;&#x2F;www.theguardian.com&#x2F;world&#x2F;2013&#x2F;jul&#x2F;18&#x2F;history-north-k...</a>