The unit of spot silver is USD/oz, while the unit of silver TD is RMB/kg, so the first consideration is unit conversion.

Dollar/ounce, converted into yuan/gram;

Tentative 1 USD =6.7 yuan RMB, 1 oz = 31.1g;

Then according to the current price of 25 dollars/ounce = 25 * 6.7/31.1= 5.385 yuan/gram = 5,385 yuan/kg;

However, we will find that the price of RMB quoted after simple unit conversion is different from that of silver TD.

This involves the premium of internal and external prices. Due to tariff, exchange rate and other factors, there is a premium in the internal and external prices of silver.

Therefore, in addition to unit conversion, the TD price of silver needs to be superimposed with a premium.