Through the conversation with the middle-aged man just now, he learned that in the Nia Civilization, almost every household has a Train Captain, which is not considered anything unusual. His family at the time sold off all assets and combined savings to gather sufficient resources for a journey of ten thousand years, setting off on this gold-digging expedition.
But...
When they returned, everything had changed beyond recognition.
What he's more curious about now is, since there used to be a Fourth-level Civilization here, the "Nia Civilization", where did this civilization go later? Why didn't it leave any trace?
Moreover—
"After his father's death, the train remained without a Train Captain. Under such circumstances, the train should have been on the brink of self-destruction, right?"
Chen Mang muttered softly.
