Usually, the measurement tools in the domestic gold jewelry processing industry are mostly based on decimals, and the measurement units of decimals are calculated by dichotomy, minute and minute. The unit conversion between decimals is calculated in decimal system, that is, 1 min = 1 min =1min,1min. However, due to the different system of units in ancient and modern times, the grams of one or two are also different. For example, before the Ming Dynasty, one kilogram was about 600 grams, which was 16. Converted, one or two is 37.5 grams, then one or two gold is 37.5 grams.
In fact, the conversion is not only different in different years, but also related to different regions. In Hong Kong, the concept of "gold" was different at first. A kilo in Hongkong is 600g, and a kilo is equal to 16 liang, and one or two is equal to 10 yuan. Converted down, one or two is equal to 37.5 grams, and stores like Chow Tai Fook are based on Hong Kong, which is 37.5 grams; In Taiwan Province Province, one or two equals 3 1.25g, that is, 500g divided by 16.