1928 was used in Qing dynasty, and the Sima system was used. One Jin is about 16 Liang (500g), and one Liang is about 31.25g..

Then 502000 is 500000 * 31.25 =15625000 grams.

Now a gram of silver is almost 7 yuan on the market.

So 502,000 silver should be changed into RMB now:

5000000 * 31.25 * 7 =109375000 (yuan)

In ancient times, people knew about silver. Like gold, silver is a precious metal with a long history of application, which has a history of more than 4,000 years. Archaeologists in China discovered a "gold-silver fault" (a pattern inlaid with gold and silver wires) embedded in the surface of bronze wares unearthed in the Spring and Autumn Period. The silverware unearthed in the ancient tombs of the Han Dynasty is very beautiful. Because of its unique excellent characteristics, silver is endowed with dual values of currency and decoration. In ancient times, the biggest use of silver was as a medium of commodity exchange-money.