Underground, an extremely colossal subterranean project, after ten days, is finally completed.
However, this is just the completion of one underground project; the vast corresponding underground tunnel construction is still not finished.
Building tens of thousands of kilometers of tunnels is no easy task.
To construct this subterranean project, several super-large gold mines nearby have been directly mined out by Zhou Yingting, and now they have moved to more distant places to continue mining.
Fortunately, in more distant positions, there are still quite a few super-large gold mines. Apart from the increasing distance of mining, there's no other major concern.
Underground tunnel construction must not stop; once local resources are exhausted, with the underground tunnel, he can move to further places to mine resources.
If it were on the surface, continuous back-and-forth resource extractive vehicles would press wheel tracks into the ground, eventually exposing his base location.
