Capitalized numbers are a unique way of writing numbers in China. Use Chinese characters with the same pronunciation as numbers instead of numbers to prevent them from being tampered with. According to textual research, capitalized numbers were first invented by Wu Zetian and later improved by Zhu Yuanzhang.
Zhu Yuanzhang issued a decree because of a major corruption case "Guo Huan case" at that time, which clearly required that the number of bookkeeping should be changed from "one, two, three, four, five, six, seven, eight, nine, ten, ten and one hundred thousand" to "one, two, three, four, five, seven and nine".
Later, "Mo" and "Qian" were rewritten as "Bai and Qian", which have been used ever since.
relevant information
"One, two, three, four, five, six, seven, eight, nine, ten, hundred and thousand" are full-time Chinese characters representing numbers, which are generally called lowercase numbers. Lowercase numbers are relatively simple and easy to be altered, so capital numbers "one, two, three, four, five, six, seven, eight, nine, ten and hundreds" should be used in documents and commercial bills.
"lowercase" refers to numbers, and "uppercase" only refers to numbers in bookkeeping. The two use different scenes, but not the relationship between simplified and traditional. Calligraphy works are not accounted for, and it is meaningless to use "capitalization" at will. "Capitalized numbers" have their own meanings.