Kangxi Tongbao
Kangxi Tongbao (traditional Chinese: 康熙通寶; simplified Chinese: 康熙通宝; pinyin: kāng xī tōng bǎo) refers to an inscription used on Chinese cash coins produced during the reign of the Kangxi Emperor of the Manchu-led Qing dynasty. Under the Kangxi Emperor the weights and standards of the brass cash coins changed several times and the bimetallic system of Qing dynasty coinage was established.