sentences:  Li Shimin thus interceded with Emperor Gaozu to keep Du on his staff.Du later followed Li Shimin in campaigns against Tang's major enemies Xue Rengao the Emperor of Qin, Liu Wuzhou the Dingyang Khan, Wang Shichong the Emperor of Zheng, and Dou Jiande the Prince of Xia, contributing strategies to LI Shimin's campaigns.For his achievements, Du was created the Baron of Jianping.