 Li Zitong abandoned Jiangdu and fled to Jingkou, and then further east, attacking Shen and forcing Shen to commit suicide.Li Zitong took over modern Zhejiang from Shen, while modern central and southern Jiangsu came under Li Fuwei's control, and Li Fuwei moved his headquarters from Liyang to Danyang.In spring 621, with Emperor Gaozu's son Li Shimin the Prince of Qin putting the Zheng capital Luoyang under siege, Du sent his generals Chen Zhengtong () and Xu Shaozong (), with 2,000 men, to assist Li Shimin in his campaign.