I find all these stories of North Korea fascinating. The USSR and China both realized that free markets are a better system and adjusted accordingly. North Korea just seems to keep betting on a system that's broken.
China can hardly be called a free market, by the way.
Read up on the chicken tax and the incident with Kerrygold butter in Wisconsin.
More recent examples are how the telcos got net neutrality repealed, the media companies strengthening copyright, and Trump loosening EPA restrictions. Those aren't really "free market" moves, but called free market by the parties who benefit from them.