The plague that had plagued humanity for over a year finally subsided as the toxins receded.
On September 20th, country Z achieved zero infections, marking the end of the great plague.
However, at this time, the population of country Z was only a little over 40 million.
Out of the 1.4 billion people nationwide, less than 3% had survived.
Moreover, these 40 million people were not evenly distributed.
Among them, 15 million were in Longcheng, 9 million in Shancheng, and Jiangcheng and Haicheng each had only 8 million survivors.
The eastern and southern regions of country Z were originally the most densely populated areas.
However, due to the impact of various natural disasters, the surviving population was even smaller than in the northern and western regions.
Especially during the great plague, many people contracted a highly contagious and virulent disease after direct contact with ancient viruses in seawater.
This resulted in a survival rate far below 3% in the eastern and southern regions.
Longcheng, as the capital of country Z, accommodated the largest population.
But this was by no means a good thing.
With a large population and scarce resources, each person received fewer supplies.
And once supplies became short, it was easy to trigger vicious events. kuAiδugg
This was also the reason why the Longcheng underground city would eventually implement martial law in the previous life.
To facilitate the transfer of resources between underground cities and to open channels for the exploitation of natural resources, the construction plan for an underground transportation network was also put on the agenda.
On October 1st, the Longcheng underground city, capable of accommodating 15 million people, was completed.
Thus, all four official underground cities were completed.
All survivors in country Z moved into the underground cities.
In the future, as long as there were sufficient supplies and manpower, the underground cities could continue to expand outwards and downwards.
After the completion of the underground cities, the construction of the underground transportation network also began.
The underground transportation network comprised four straight lines connecting Longcheng, Jiangcheng, Shancheng, and Haicheng.
But these were no ordinary straight lines.
They would include two high-speed rail lines and a four-lane highway in each direction.
The tunnels for the roads and railways, like the underground cities, were encased in a fixed fluid, maintaining their temperature and oxygen levels.
Along the routes, stations would be built at regular intervals to provide supplies for vehicles and to maintain the roads, railways, and tunnels in that section.
Each station was also an independent module with its own life support system and an entrance/exit to the surface, essentially a small underground city.
In case of a tunnel malfunction, vehicles and personnel could enter these stations for shelter.
City G's underground city was located between Jiangcheng and Haicheng, so it was also included in the underground transportation network.
Once the plan was finalized, construction began.
Tang Li once again directed the wireless brain-controlled robots and engineering mechs to excavate underground tunnels simultaneously in the directions of Jiangcheng and Haicheng.
The four official underground cities also dug in two directions to speed up construction.
After the tunnels were excavated, fluid containment magnetic field equipment would be installed, followed by the injection of fluid, and then the laying of the tunnels and station modules.
The tunnels and station modules were manufactured by the authorities, and the City G underground city was only responsible for excavating the tunnels.
Each section of the tunnel, like the underground city modules, would have various instruments and facilities installed in advance.
However, only the tracks for the roads and railways were left.
After the tunnels were laid, the railways and roads within them would be laid to form a complete network.
However, regardless of how it was done, the completion of the underground transportation network would not be until next year.
In November and December of year 344, Tang Li's two children were born successively.