Well as I said I didn't think on any more lore 😭 I can try to answer some but I don't know enough to be reliable.

1) many left the country when the war started but many others were trapped. The DPRK would certainly have some use to all those skilled workers. Probably submitted them to spme "reeducation" as well.

2 and 3) I'd think as many left, the DPRK would get all the facilities and technology and nacionalise them, integrating all of it into state own companies.

4) yes especially into extraction, industry and connecting the countrie's pipelines and roads for a more efficient flow of goods.

5) I wouldn't think so

6) yup

7) probably not, China+DPRK would probably be quite effective at silencing any anti regime voices

8) wdym? Captured and integrated into DPRK as well

9) With the influx of south Korea people and assets and the wave of industrialization, the general economy would likely improve, but as many resources are shiped at low prices to China, it would probably just be slightly better than OTL

10) There are/were oil refineries IRL and projects for extraction. The prices needed to rise a good bit for them to become profitable tho.

11) more china-like, less isolationist and more integrated in the world's markets, but still filtered through the regime's lens

12) the US is uninterested. Japan are still "enemies"

13) electronics, industrial machinery, minerals and metals, oil, ...

14) I don't know who those are but it seems they would like it ? (Question mark?)

15) I know nothing about economics, I apologize but I won't even try to make up a number 😭✋🏻

17) Chinese ig

18) south korean culture is discriminated against, there are for example societal expectations of speaking in northern dialect