Qi Huangong first sought hegemony. First, Qi is a big country in the East with rich economy. Second, taking Guan Zhong as the prime minister, he carried out reforms in military affairs, internal affairs, production, etc. Reform is the fundamental reason for Qi's strength. Third, it complied with the political situation at that time and had a certain appeal under the banner of "respecting the king and rejecting foreign countries".

Qi Huangong appointed Guan Zhong as prime minister to promote national unity and become the first overlord. Qi Huangong acceded to the throne in 685 BC. He carried out a series of political and economic reforms, which made Qi strong. As he led the troops to repel the attacks of the Rong and Di nationalities, and led the Qi, Lu and Song divisions to defeat Cai and Chu, he prevented the Chu army from advancing northward, and his prestige increased greatly. In 65 1 year BC, he made a covenant with Chen Kui (now Kaocheng, Henan Province) and became the first overlord in the Central Plains. Qi Huangong appointed Guan Zhong to actively reform internal affairs and develop production; Reform the military system and form a strong army; Put forward the slogan of "respecting the king and rejecting the foreign countries", resist the nomadic people in the north and expand the border. In 65 1 year, a meeting of the governors' alliance was held in Kuiqiu, and Zhou sent representatives to attend, officially recognizing the hegemony in the Central Plains. The significance of Guan Zhong's political reform: making the country rich and strong. Defended the advanced farming civilization of the Central Plains. Qi Huangong became the first overlord in the Spring and Autumn Period.