Certain that the underground portion of Black Horn City was likely a hundred times larger and more complex than the part aboveground, Meng Chao truly grew excited.
Following the special scent emitted by his cloak after it had been soaked in a secret medicine, he moved nimbly through the pitch-black darkness like a bat, completely unimpeded.
Whenever he reached a fork, all he had to do was take several deep breaths and judge by the strength of the scent to find the right path.
Gradually, after squeezing through several collapsed tunnels with great difficulty, the walls of the passageways around him became dry, spacious, and sturdy.
The walls of pipes buried close to the surface were mostly built from bricks, stones, or clay. After years of disrepair, rainwater had seeped in, naturally turning them into a complete muddy mess.
But the pipe walls deeper underground used large amounts of materials resembling Reinforced Concrete and even solid metal. After the erosion of countless millennia, apart from growing a slight layer of rust, they remained incomparably sturdy.
With every stretch of passage he crawled through, Meng Chao constructed an increasingly massive three-dimensional model of the underground pipeline system in his mind.
Judging by the diameter of the passageways and the materials of their walls, these tunnels had definitely not been built for sewage disposal in the first place.
In the silt deep inside one passageway, Meng Chao even discovered structures resembling rails.
They were like the underground Subway Lines of Dragon City.
When he sent a stream of Spiritual Energy into the "rails," Meng Chao sensed a rather intense spiritual magnetic reaction.
This showed that the "rails" here were more advanced than Dragon City's, employing anti-gravity technology similar to Magnetic Levitation!
Fortunately, Meng Chao had already seen elevator-like automatic lifting equipment in