 During its existence, it was a prominent player on the Silk Road.From around the third or fourth century, the Kingdom of Kucha began to manufacture the Wu Zhu cash coins inspired by the diminutive and devalued Wu Zhu's of the post-Han dynasty era in Chinese history.It is very likely that the cash coins produced in Kucha predate the Kaiyuan Tongbao (開元通寳) and that the native production of coins stopped sometime after the year 621 when the Wu Zhu cash coins were discontinued in China proper.