Yu founded Xia dynasty around 2070-2025 BCE. Yu controlled massive flood with canals and dikes. 2016 stratigraphic and radiocarbon evidence confirms outburst flood at 1920 BCE. Flood matches chronicles attributing it to Yu. Yu defeated threatening Miao tribe. Yu divided China into 9 provinces. Yu's son Qi started first hereditary dynasty. Chinese records portray Yu as ideal ruler of diligence and piety. Every subject accessed Yu's palace for complaints. Step named after Yu used in Chinese folk rituals. Xia-Shang-Zhou project dates Yu's reign officially as 2070-2025 BCE. Yu succeeded Shun and was fifth from Yellow Emperor. Court rejected Yu's chosen successor for his son Qi.