 Du refused the commission, instead offering submission to Yang Tong.Yang Tong commissioned Du as the grand commandant of the eastern forces and created him the Prince of Chu.Meanwhile, Du was contending for the control of the region with Chen Leng, who took over Jiangdu after Yuwen's departure; Li Zitong, then at Hailing (海陵, in modern Taizhou, Jiangsu); and Shen Faxing, then at Piling (毗陵, in modern Changzhou, Jiangsu) and who claimed the title of Prince of Liang.