 Later that year, Emperor Xuan passed the throne to his young son Yuwen Chan (Emperor Jing), becoming retired emperor—but with the highly unusual title of "Emperor Tianyuan" (天元皇帝, "Tianyuan Huangdi").He proceeded to rule in an erratic and cruel manner, causing officials to become alienated.His acts included raping Yuchi Jiong's granddaughter Yuchi Chifan, who had married Emperor Xuan's cousin Yuwen Liang (宇文亮)'s son Yuwen Wen (宇文溫) the Duke of Xiyang, causing Yuwen Liang to plot rebellion.