Zizhi Tongjian, vol. 189. Volume 189 of Zizhi Tongjian recorded that Wang Shichong's death took place between the dingmao and guiyou days of the 7th month of the 4th year of the Wude era of Li Yuan's reign. The dates correspond to 4 and 10 Aug 621 in the Julian calendar. In addition, the same volume also recorded that the decree to demote Wang Shichong to civilian status and to exile him to Sichuan along with his brothers, sons and nephews was issued on the bingyin day of the same month. (丙寅，诏赦世充为庶人，与兄弟子侄徙处蜀...) This corresponds to 3 Aug 621 in the Julian calendar.
