The Overlord Valiant Soldier

1. First life (background): Jiang Chen, a modern special forces king and chemistry doctorate holder, accidentally transmigrates during a quantum experiment.

2. Second life (past): After transmigrating to an ancient otherworld, he uses modern knowledge to become a generation's hegemon, the Emperor Tianqi of the empire. When he dies of old age, his soul does not disappear, but is once again captured by quantum effects.

3. Third life (main plot): His soul transmigrates to Earth 500 years after the apocalypse and possesses the dying experimental subject No. 517 of the "Super Warrior Project," beginning a legendary rise in the post-apocalyptic wasteland to rebuild civilization and climb back to the peak.

Core highlights: the collision between modern technology and ancient warfare, clashes with the dark powers of the future, brains and courage, passionate counterattacks, technological suppression, and faction building.