[Why] During the era of Yao and Shun, devastating floods ravaged the Yellow River basin and threatened the survival of early Huaxia tribes. The tribal confederation urgently needed a definitive solution to save populations on the brink of extinction. [What] Yu the Great inherited the mission and abandoned his father Gun's failed blockade approach in favor of scientific channeling and diversion. He personally led millions of laborers to split mountains, dredge rivers, and guide floodwaters into the sea. [Who] Yu the Great famously passed his own home three times in thirteen years without entering, embodying extraordinary dedication and organizational talent. The tribal masses contributed enormous sacrifice and unity during the works. [How] Beyond eliminating the disaster, the success reshaped the Nine Provinces of Huaxia and consolidated Yu's authority. It laid the material and popular foundation for the founding of the Xia dynasty and the institution of hereditary succession.
Why
The historic event of Great Yu Taming the Flood represents a key developmental peak of the Huaxia dynastic system. The primordial hydraulic engineering victory of Huaxia. By establishing this moral or administrative benchmark, it continues to shape the structural and philosophical fabric of ancient Chinese statecraft.