Jianyan Tongbao money was minted during the Jianyan period of the Southern Song Dynasty (1127-1130), and was made of bronze and iron. The face text "Jianyan Tongbao" has two kinds of books, italics and seals, and reads them. Jianyan Tongbao copper coins are small flat money, folded two coins, folded three coins, the general diameter and weight are: small flat money 2.38 ~ 2.56 cm, 2 ~ 4.7 grams; fold two money 2.55 ~ 3.1 cm, 2.2 ~ 8.9 grams; fold three money 2.95 ~ 3.26 cm, 5.3 ~ 8.4 grams.
This Jianyan Tongbao coin is bronze, folded into three coins, with a diameter of 2.95 cm and weighs 5.3 grams. Face letter.