Han was particularly powerful after the general Hulü Guang was falsely accused of treason and executed in 572, and he, Mu, and Gao Anagong were referred to as the "Three Nobles," controlling the government together, and they were later blamed for the deterioration of Northern Qi.
Han's authority increased significantly after General Hulü Guang was unjustly accused of treason and executed in 572. He, along with Mu and Gao Anagong, became known as the "Three Nobles" due to their collaborative rule, but they were later held responsible for Northern Qi's decline.