Wang Mang officially set the capacity standard of 100 double bronze, with one welcome = ten buckets, one bucket = ten liters and one liter = 10.
Traditional weights and measures do not completely use decimal system, such as 1 kg equals 16 Liang, and 1 foot equals 12 inch. The metric system uses the decimal system completely, which is more direct to convert. The government of the Republic of China implemented the market system in the1920s, which was connected with the metric system. In the1980s, the Hong Kong government vigorously promoted the benefits of the decimal system. At that time, there were slogans such as "decimal is fair and easy to calculate" or "decimal is easy to calculate", but people still generally used non-decimal conversion such as the old system and the English system.