Oberon's pictures reminds me of a Bill Hicks joke about a certain western country's sale of equipment to Saddam's Iraq: Tractors for crop spraying, armoured to protect the driver from falling fruits and with a turret and barrel for easy spraying... "do you KNOW what they did with that?!"
Yeah no doubt China has equipped NK with both hardware and know-how in the past, distant or near but like Oberon also said, the relationship between the two has been freezing cold for some time now.