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. It is clearly required that the number of bookkeeping must be changed from "one, two, three, four, five, six, seven, eight, nine, ten, ten and one hundred thousand" to "one, two, three, four, five, six, seven, eight, one hundred (odd number) and one thousand (odd number). Later, "Mo" and "Qian" were rewritten as "Bai and Qian", which have been used ever since.
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Whether it is Arabic numerals (1, 2,3 ...) or Chinese lowercase numerals (1, 2,3 ...), because the strokes are simple and easy to be altered and tampered with, the numbers on general documents and commercial financial bills should be capitalized in chinese numerals: one, two, three, four, five, six, seven and eight. For example, "3,564 yuan" is written as "3,000 Wu Bai and 64 yuan".
These Chinese characters appeared very early and were used as capital numbers. The complicated writing of this number was fully used as early as the Tang Dynasty, and then it was gradually standardized as a set of "uppercase numbers".