In the 1970s and 1980s, Wu gained experience as the captain of
frigates and
destroyers. From 1984 to 1992, he served as the deputy chief of staff of the
Shanghai Naval Base, a major support base for the
East Sea Fleet, strategically located at the mouth of the
Yangtze and close to China's largest city.
Jiang Zemin, future
General Secretary of the Chinese Communist Party, was serving as
Shanghai Party secretary during this time, leading some PLA-watchers to speculate that Wu may have cultivated ties with Jiang. In 1992, Wu became
chief of staff of the
Fujian Support Base in the East Sea Fleet. In 1994, at age 49, he was appointed commandant of the Dalian Naval Academy, his alma mater and the PLA Navy's highest educational institution for surface vessel officers. He was also promoted to
rear admiral. Wu rejoined the East Sea Fleet as a deputy commander in 1998. In 2002, he was appointed commander of the
South Sea Fleet. He was promoted to
vice admiral a year later. In 2004, he moved to Beijing after being promoted to deputy chief of the
PLA General Staff Department, a Grade 3 (military-region leader grade) position that made him the second-highest-ranking operational officer in the PLA Navy. ==Command of the PLA Navy==