The use of capital figures began in the Ming Dynasty. Zhu Yuanzhang issued a decree because of a major corruption case "Guo Huan case" at that time, in which it was clearly required that the number of bookkeeping must be "one, two, three, four, five, six, seven, eight, nine, ten, ten, ten and thousand".
Change it to traditional Chinese characters such as "one, two, three, four, five, land, seven, eight, nine, pick up, hundred (strange), thousand (money)" to increase the difficulty of altering the account books. Later, "Mo" and "Qian" were rewritten as "Bai and Qian", which have been used ever since.
Capitalized numbers were invented by working people in long-term practice. Wu Zetian inherited the folk writing method and used a large number of capitalized numbers, making it wide and popular. Zhu Yuanzhang, out of the country's rectification in the economic field, ordered the large-scale compulsory implementation of fully capitalized figures throughout the country, thus perfecting and standardizing the application of capitalized figures.