In August 383, Fu Jian set out from Chang 'an with an army of 870,000. On the way south, smoke billowed, infantry and cavalry, plus vehicles, horses and trench, the team was vast, almost thousands of miles long. A month later, Fu Jian's main force arrived in Xiangcheng (now south of Shenqiu, Henan Province), Yizhou Water Army also went downstream to the east, and troops north of the Yellow River also arrived in Pengcheng (now Xuzhou, Jiangsu Province). From east to west, on the long front of Van Dory, the former Qin army went hand in hand with water and approached the south of the Yangtze River. When the news reached Jiankang, Emperor Xiaowu of Jin and all the officials in Beijing panicked. The military and civilians in the Jin Dynasty were unwilling to let Jiangnan fall into the hands of the former Qin Dynasty, and everyone hoped that Prime Minister Xie An would make up his mind. Xie An is a native of Yang Xiachen Jun (now Taikang, Henan Province). He was born into a noble family. He and Wang Xizhi were good friends when he was young. He often travels around Dongshan in Huiji, reciting poems and talking about articles. He was very famous among the literati class at that time, and everyone thought he was a very talented person. But he would rather live in seclusion in Dongshan than be an official. He was recommended to be an official. He has been in office for more than a month, and he doesn't want to do it. At that time, there was a saying among the literati: "What will the people do if Xie An doesn't come out to be an official?" It was not until he was in his forties that he came out to be an official again. Because Xie An lived in seclusion for a long time, he later called it a "comeback" and came out as an official again.