Number 0 was headed to the Eastern Yi Tribe, a different tribe compared to the previously visited Tushan Tribe, located in the Yellow River Valley. Besides the different geographic location, this tribe had already transitioned into a patrilineal society. Agriculture and pastoralism were highly developed, and the use of human tools was no longer confined to the early agricultural implements, but had gradually shifted to usage by state violence institutions, namely, the military.
According to materials Xia You previously consulted in the library, the waters controlled by Yu were not the Yellow River itself, but a nearby tributary. Amid the severe natural conditions of the big river's floods and the small river filling up, Yu organized people to manage water continuously near these tributaries, using methods of divergence and guidance.
