After the demise of the Qin Dynasty, the Qin system was still used in the early Western Han Dynasty. However, in the first half of the Han Dynasty, the actual weight began to become lighter, and Emperor China's half money weighed four baht (twenty-four baht). Coins have different names and weights. The history of world currencies is the same, and the ruling class saves money. On the other hand, it marks the establishment of monetary progress.

Evolution of Coin Development in Han Dynasty

BC 1 19 was also the inauguration ceremony of Emperor Wu of the Han Dynasty. Emperor Wu of the Han Dynasty carried out the monetary system reform and adopted new third-class white gold coins: 1,000 yuan for a dragon three, 500 yuan for a horse and 300 yuan for an oval turtle. The so-called platinum is actually an alloy of silver and tin, with less silver and more tin, which devalues spontaneously at a high price, and the first platinum coin is privately cast.

The price is so high that it naturally depreciates. Coupled with the high price of silver and the low price of tin, thousands of people privately cast them. As a result, platinum only took one or two years to waste ~