The underground city plan was finally activated. The engineering teams of the various countries rushed to various construction sites. They were prepared to build an extremely large human underground city from all directions.
This project sounded easy, but after the real construction, it would involve many problems. First of all, according to the engineering blueprint, the underground city would be built five thousand meters underground. It would be built into a large city with a population of more than a million.
Such a large city would be spread across the various continents, so the difficulty could naturally be imagined. The most elite engineering team from all over the world rushed to the city and held a discussion meeting overnight. Through this meeting, they had to solve a few important problems. This concerned whether the underground city could be successfully built.
