One or two silver coins for Chinese and foreign Tongbao. The front inner circle horizontal book reads "Guanping" on the right and the straight book "Yin 1 or 2" on the left, while the outer circle has four characters for "Chinese and foreign Tongbao". The back inner circle is a picture of Yin and Yang of Taiji Eight Diagrams, and the outer circle is two dragon lines connecting the Prime Minister and the Taiji Eight Diagrams. Chinese and foreign Tongbao: also known as Chinese and foreign Tongbao Guan Pingyin one. There are three opinions about the coinage of Tongbao silver coins at home and abroad: one is that the Tongbao silver coin system was founded in 1854 by Shanghai Jianghaiguan Customs, and was commissioned by foreign advanced mints; the other is that the Tongbao silver coin was coined by the British Mint for tax purposes in Shanghai, which was discovered in 1858 by Xianfeng; the other is that the Tongbao silver coin was coined by the British Mint in 1858. One theory holds that the Tongbao silver coin was coined by the Dianyuan Bureau of Korea's Gaozong 21 years (1884). It's very rare on the market. The value of this coin is very high.