 His son Yuwen Huaji later led a coup against Emperor Yang in 618 and, after killing Emperor Yang, briefly claimed imperial title in 619, but was soon captured and killed.Another son of Yuwen Shu, Yuwen Shiji, however, was a friend of Tang Dynasty's founder Li Yuan (Emperor Gaozu), and after Li Yuan established Tang remained an influential official.Yuwen Shu's ancestors were originally named Poyetou (破野頭) and were ethnically Xianbei.