Global Cave: the Core Was Dug at the Beginning

The whole world fell into a huge and deep underground cave overnight. When countless people were in despair, geologist Chen Yao awakened the core analysis system. While others struggled to survive, he easily found rare minerals and underground water sources by analyzing rock composition. Until he found a line of warning inscriptions from ancient civilizations on the rock wall: "Deep in the heart of the earth, they are awakening——"