In the 18th year of the Shunzhi-reign period ( 1661) ，in response to the threat of Zheng Chenggong and other anti- Qing forces，the Qing government ordered Zu Yonglie to lead the Hanjun Banners stationed in Suzhou，to strengthen the Jiangnan region's military defense forces． There were thousands of officers and soldiers in the Eight Banners Army in Suzhou and their barracks were in the north of the city． Zu Yonglie's troops were undisciplined and they occupied lands and homes，forced evictions of residents，and a destructive impact on the local society and economy． The military spending on the Eight Banners Army in Suzhou had also become a heavy financial burden． In the 3rd year of the Kangxi-reign period ( 1664 ) ，because the anti-Qing forces' threat to Jiangnan had been reduced，the Qing government re-adjusted its military deployment and abolished the Banner garrison in Suzhous.