Manufacturing methamphetamine requires relatively little in the way of sophisticated equipment; it can be manufactured in a bathtub in someone's home. That's one reason why it was relatively easy to privatize (or partially privatize) production inside North Korea. Evidence from my interviews with people involved in the manufacturing and distribution of methamphetamine made inside North Korea consistently indicates that the precursor chemicals are coming from China via cross-border illicit trading and smuggling networks.
February 7, 2016, ,
The Daily Beast