In 1644, after the death of Emperor Chongzhen, Zhu You Song (朱由崧), the King of Fu (福王), was appointed Emperor of Nanjing (南京) and changed his name to Hongguang in another year. Later, the Qing army quickly descended to the South and besieged Yangzhou (扬州). The city of Yangzhou was destroyed and the Qing army slaughtered the city. Historically, it was called "the 10th day of Yangzhou" ("扬州十日"). Soon after Nanjing fell, Emperor Hongguang was captured.