 In 2000 he became the Deputy Party Secretary of Fushun and moved to the post of the deputy party chief of Shenyang in 2007.Su was promoted to head the Political and Legal Affairs Commission of Liaoning in October 2011, and a member of the provincial party standing committee, a part of the province's highest echelon of power.On April 6, 2016, Su Hongzhang was placed under investigation by the Central Commission for Discipline Inspection, the party's internal disciplinary body, for "serious violations of regulations".