The zu-yong-diao system of taxation (levies of grain, labor and cloth) was first established. (New Book of Tang (Xin Tangshu), Annals 新唐書 卷001 高祖 武德2年2月)
Wang Shichong deposed Yang Tong, Prince of Yue, and declared himself emperor (the Zheng state). (New Book of Tang (Xin Tangshu), Annals 新唐書 卷001 高祖 武德2年4月)
In March 619, Dou Jiande takes Yoseong; Wang Cong captures Shan Guo and rebukes him; when Shan Guo tries to kill himself, Song Zhengben stops him; because Jiande does not show him due courtesy, Shan Guo flees to Xiangzhou. (Zizhi Tongjian (Comprehensive Mirror) 권187 619년 항)