Guan Zhong (; c. 720–645 BC) was a Chinese philosopher and politician. He served as chancellor and was a reformer of the State of Qi during the Spring and Autumn period of Chinese history. His given name was Yiwu (). Zhong was his courtesy name. He is mainly remembered for his reforms as chancellor under Duke Huan of Qi, as well as his friendship with his colleague Bao Shuya, though his reputation remained controversial among the Confucians, as detailed in the Philosophy and appraisal section. Through Guan Zhong's reforms and skilful diplomacy Qi became the most powerful of the feudal states and Duke Huan became the first of the Five Hegemons. Though knowledge of his reforms is limited, in particular he instituted a famous fiscal policy known as "balancing the light and the heavy", associated with salt and iron monopolies. Though otherwise a diverse work, the Guanzi compilation making use of his name makes similar such recommendations. Life Youth and friendship with Bao Shuya Guan Zhong, a descendant of either Shu Xian of Guan or King Mu of Zhou, was born in Yingshang, and became acquainted with Bao Shuya at an early age, when they became business partners. The Shiji records that, as partner, Guan Zhong often took more than his share of the profits, in effect cheating Bao Shuya. Bao, however, recognised his impoverished background and was not offended. Tutors of different princes Subsequently, Guan Zhong was appointed tutor to Prince Jiu, the younger brother of the ruling Duke Xiang of Qi. Bao Shuya, meanwhile, became tutor to Jiu's younger brother, Prince Xiaobai. In 686 BC, Duke Xiang was murdered in a palace coup by two of his ministers, who then installed Gongsun Wuzhi, a scion of the ducal house, as the new Duke. Recognising that they were in mortal danger, both Prince Jiu and Prince Xiaobai fled with their respective tutors. Prince Jiu fled to the State of Lu, while Prince Xiaobai went to the State of Ju. Becoming chancellor In 685 BC, Gongsun Wuzhi himself was killed in another palace coup, and the ministers of Qi sent envoys to Ju, hoping to receive Prince Xiaobai back and succeed to the duchy. On hearing of this, Lu also sent Prince Jiu towards Qi, while Guan Zhong intercepted Prince Xiaobai to prevent his return. In the resulting conflict, Guan Zhong shot an arrow at Xiaobai which hit his belt