両江総督
Zuo was appointed to the Grand Council, the cabinet of the Qing Empire at the time, in 1880. Uneasy with bureaucratic politics, Zuo asked to be relieved of his duties and was appointed Viceroy of Liangjiang in 1881. In 1884, upon the outbreak of the Sino-French War, Zuo received his fourth and last commission as commander-in-chief and Imperial Commissioner of the military and Inspector-General overseeing coastal defences in Fujian Province.