China, Northern Song, Tai Zu (960-976) and Tai Zong (976-997), ? ? ? ? Song Yuan Tong Bao (two examples), ? ? ? ? Tai Ping Tong Bao (two examples), ? ? ? ? Chun Hua Yuan Bao (one example), ? ? ? ? Zhi Dao Yuan Bao (two examples) (7) round cash, square hole (H. 16.1; 16.1c; 16.16; 16.29; 16.37; 16.41). About Very Fine to Very Fine. (7)