Ming Dynasty. Tai Chang Tong Bao, 1621-1627, AE Cash (4.0 g, 25.8 mm). A popular coin. Sharp characters and rims. Nice even patina. Extremely Fine.\Tai Chang\ was the year title used by Emperor Guang Zong, who died only 2 months after the succession and never issued a coin. Guang Zong's son and succ