Kangxi Tongbao was the currency circulated during the Kangxi period of the Qing Dynasty in China. During the Kangxi period, there were 24 money-making bureaus, forming a set of coins. These coins had no difference from the front, but the words behind them were different. According to the back, they could be divided into two categories: one was Manchu money imitating the "Shunzhi Four Forms". There are two kinds of Manchu in Qianbei, Baoquan and Baoyuan, which were cast by the two central bureaus of the Ministry of Household Affairs and the Ministry of Industry. The other is Manchu-Chinese money imitating Shunzhi Five Styles. Therefore, the value of Tongbao copper coins in Kangxi is determined according to the types of coins. At present, there are many differences in the characters and types on the back. The price of Tongbao copper coin in Kangxi varies from 600 yuan to 2000 yuan. Some rare products in Tongbao in Kangxi can reach hundreds of thousands or even millions.