Marquis Qi Huan

Marquis Qi Huan was a ruler of the state of Qi during China's Spring and Autumn period (770–476 BCE). Under his leadership and with the guidance of his advisor Guan Zhong, Qi implemented significant reforms. These included establishing a uniform tax system, creating a central army, and instituting state monopolies on salt and iron production.12

These changes helped Qi expand its territory and influence, leading to its dominance over other small states in the region. In 651 BCE, Qi formed a league of these states, successfully defending against northern and southern invasions. Although Qi's initial hegemony was short-lived after Duke Huan's death, these reforms laid the groundwork for future state development in China.2