There is no traditional way to write numbers, and the numbers in China have never been simplified, so there is no traditional way to write numbers, only capitalization.

Capitalize the numbers, as shown:

Note that the circled place is different from what is written now.

The above is the traditional Chinese writing of 1 to 10. In fact, the traditional way of writing in China is to capitalize one to ten, which is generally used on bills.

Capitalized numbers in extended data are a unique digital writing method 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.

Numbers are capitalized and have existed since ancient times. Although some accounts were gradually changed into Arabic numerals after liberation, they were all important accounts. Remittance by cheque; Stocks, government bonds and bills still use capitalized Chinese characters and numbers.

References:

Baidu Encyclopedia-Digital Capitalization