南海艦隊
Su spent most of his career in the PLAN's South Sea Fleet, where he served as deputy chief of staff from 2000 to 2006, chief of staff from 2006 to 2007, deputy commander from 2007 to 2009, and in January 2009, he was promoted to commander of the South Sea Fleet and concurrently deputy commander of the Guangzhou Military Region. In December 2010, Su was transferred to the East Sea Fleet, serving as its commander and concurrently deputy commander of the Nanjing Military Region.