Friend of mine is working on that project, was actually relocated to the US for it, and it is apparently a mess. Among other things, they are apparently really struggling to find anyone who actually wants to work there.
I talked with him about this before, and a big part was because Intel has a big presence there already so a lot of locals have education/experience in working with semiconductors. Which apparently isn't helping them find willing workers still. I would also wager there are probably tax incentives being given too, that is usually a big motivator for companies.
Tax and some resource regulations maybe. I know that some places got jump-started in some industries because of lax water regulations.
Americans can't even get their cheap knockoff version of Juche to work. Sad.