Gag, it is not a Maxus but a Huanghai Ruitu. I integrated most of them already some weeks ago on my website: http://www.chinesecars.net/free-info...h-korea?page=8
It seems that there is now assembly of Chinese trucks inside the Sungri facility in Tokchon. Here is the article: http://www.naenara.com.kp/en/trade/?company+1+886
On Google Earth you can see that some of the halls are re-painted blue, as is quite often the colour of the car factory halls in China.
The Chinese partner seems to be Sinotruk.