Yongle Tongbao
The Yongle Tongbao (traditional Chinese: 永樂通寳; simplified Chinese: 永乐通宝; pinyin: yǒnglè tōng bǎo, Japanese: 永楽通宝 (Eiraku Tsūhō); Vietnamese: Vĩnh Lạc Thông Bảo) was a Ming dynasty era Chinese cash coin produced under the reign of the Yongle Emperor. As the Ming dynasty didn't produce copper coinage at the time since it predominantly used silver coins and paper money as the main currency, the records vary on when the Yongle Emperor ordered its creation between 1408 and 1410, this was done as the production of traditional cash-style coinage had earlier ceased in 1393.