Reform started in late 1979, there was only a handful of special economic zones during the 80s. Ie, the Pudong side of Shanghai (where you see all the sky scrapers today) did not reform until 1990. The oriental pearl tower for example was only built in 1995 and Shanghai residents could not buy...
I am pretty sure you can only buy watered down version of rifles for civilian use, they aren't selling fighter jets / missile systems within the country.
Plus, US weapons are mostly sold to its allies for political and strategic reasons as there are no other explanations for the ridiculous...
Seoul is pretty close to north korea... within range of basic artillery fire. Seoul will be toast in under an hour if war broke out with the North.
Tomahawks also does little against, North Korea's mountainous terrain for every base the US can pick up on a satellite i am sure the North Koreans...