Soul Transmigration: Starting by Digging Through a Coal Mine

Geology graduate student Song Ming transmigrates the night before his thesis defense into the body of a disgraced official's son exiled to the frontier. His start: snow seals the mountains, the entire garrison is on the verge of death, and he must rely on "feng shui divination" to dig up the coal that will keep them alive—because the ancients don't know that what he reads was never feng shui, but geological strata. From a single coal pit to iron mines, gold mines, and oil wells, the entire court condemns him as a charlatan spreading heresy, then turns around to beg him to turn stone into gold. He tramples the barbarian cavalry and restores a bright and peaceful world to the Great Song Dynasty. — Description from novelcodex.org