Zuo Zongtang advocated "coastal defense in the east and blockade defense in the west, with equal emphasis on both" when it came to the invasion of Xinjiang by foreign powers. He advocated marching troops to regain Xinjiang and eliminate the Aqubai regime. Zuo Zongtang's proposal to regain Xinjiang is in line with the common interests of the people of all ethnic groups in our country and has been supported by public opinion. In May 1875, the Qing government appointed Zuo Zongtang as the Imperial Envoy to supervise the military affairs of Xinjiang and send troops to Xinjiang. After thorough preparations, Zuo Zongtang divided his troops into three groups and marched into Xinjiang in March 1876. With the support of the local people, he regained the lost territory in northern Xinjiang in only half a year. In the spring of 1877, Zuo Zongtang marched into southern Xinjiang and captured Turpan and other places in one go. Aguba's regime collapsed and he himself committed suicide by taking poison. In 1878, Zuo Zongtang recovered all the land occupied by Agub in Xinjiang, shattering the conspiracy of Tsarist Russia and the United Kingdom to use Agub's regime to embezzle Xinjiang.