DeleteSounds like wasteful to me. There is really no need for china to build another big high tech infrastructure center. There is only one sillicon valley in the US. In the tech industry, as with every other industry, talents will flow to where its better to their careers/pockets, not where its closer. And besides, with the tech advancements, working at distance will become more prevailling in the future.
I think that the chinese government should understand that they cant develop everything in every territory. Even in the US, there are a lot of scarcely populated regions that live primarily of agriculture and turism. Taking into account the caracteristics of NE china (being more plain and more fertile than other regions of china), whats the problem of those regions specializing in agriculture? And i dont think that NK will ever be much helpful to NE china in economic terms.