Founder of the Xia dynasty (traditional date 2070 BCE per the Shiji-rationalized chronology); flood-controller through the channel-and-drainage strategy that succeeded where his father Gun's dam-building strategy had failed. Son of Gun and (per some traditions) a woman named Xiu Ji; conventionally dated to the late 22nd-early 21st c. BCE. Spent thirteen years in continuous flood-control labor traversing the empire; per the canonical tradition, passed his own house three times during the work but did not enter, prioritizing public-duty over family — one of the foundational sage-king-moral-frugality case-studies of the Confucian tradition. Upon completing the flood-control, divided the empire into the Nine Provinces (Jiu Zhou), establishing the foundational political-geographic framework of Chinese imperial-state administration; the Shujing's Yu Gong "Tribute of Yu" chapter is the foundational political-geographic text of Chinese civilization. The Yu-foundation broke the Yao-Shun-Yu meritocratic-abdication chain by transmitting the throne to his own son Qi rather than to a meritorious minister — establishing the hereditary-dynastic principle that subsequent Chinese imperial-state structure followed. The break-of-meritocratic-abdication has been a perennial topic of political-philosophical debate in Chinese intellectual history: Mencius (5A.5-6) defends the transmission to Qi as Heaven's will rather than Yu's preference; later commentators (notably the Hanfei legalist tradition) read it as the inevitable transition from primitive-virtuous-rule to hereditary-realpolitik.