 These cash coins were first documented in the Volume One 2010 edition of "China Numismatics" (), which has an article entitled "Zhangjiachuan Prefecture Excavates 'Drilled Hole' Ban Liang".In this article the author explains that in the summer of the year 2006 he had purchased about two-hundred recently discovered and unearthed Ban Liang cash coins.These cash coins were excavated in the Zhangjiachuan Hui Autonomous County of the Gansu Province in located in northwest China.