C730 Yin Sect

"The patriarchs of the Beiming family have a longer lifespan. Normally, they would only abdicate at two to three hundred years old. However, it took eleven patriarchs time to build this city."

Yuwen Tian made a rough estimation. Even if every patriarch abdicated at two hundred years old, it would take more than two thousand years. It was much more than what he had estimated