It covers details down to every region's temperature, soil, social relations, dietary structure, and so on.
Others might be clueless if asked, but here comes a train conductor who's actually traversed ten major regions. Not only is he highly skilled, capable of exploring dangerous areas, but he also has a good memory. Su Huan remembers every detail and character, except for those logically inconsistent dream scenes.
Even if he wasn't attentive at the time, anything he's seen is stored in his mind like photos and videos. He just needs to review it briefly.
A group of experts listens to Su Huan's revelations as if they've found a treasure, forgetting to eat and sleep.
But a bunch of elderly folks can't keep up with Su Huan. Every few days, elderly men and women faint and get carried out by medical staff. When Marcus and the Elder Marshal take a look, they realize it's untenable and order the medical staff to forcibly remove experts on the brink of exhaustion.
