2. Later, with the trading ports, Roman numerals were introduced into China. Roman numerals are the earliest numerical representations, which are more than 2,000 years earlier than Arabic numerals and originated in ancient Rome, but they came into being later than Oracle Bone Inscriptions and China, and even later than Egyptian decimal numerals. Roman numerals are represented by "one, two, three, four, five, six, seven, eight, seven", but there is no such important number as 0. "0" represents evil in Rome.

3. Essentials of Mathematics edited by He Guozong, Mei Gu and others during the Kangxi period of Qing Dynasty. A group of special numerical names are listed: Ge (100), Bai (102), Qian (103), Wan (104), Yi (108) and Zhao (/). (1028), Gou (1032), Jian (1036), Zheng (1040), Zai (1044), Ji (/kloc-0).

The first few are decimals, starting with 100 million.

Taiping Yulan said, "100,000 represents 100 million, 1 billion represents a symbol, and 10 trillion represents Beijing. This is what Beijing means." Sun Tzu's calculation of classics is called "10", which shows that there are two different calculation methods. ) Numbers less than single digits, from big to small, are Fen, Li, Hao, Si, Hu, Wei, Xian, Dust, Ai, Mighty, Desert, Ambiguous, Wandering, Twinkle, Twinkle (the sound of six musical instruments), Void (the least number) and Quiet.

4. Arabic numerals and chinese numerals are commonly used now. Arabic numerals are used for calculation, and chinese numerals is used for text description. Capitalized China numbers are used in the financial system.

Chinese numerals: one, two, three, four, five, six, seven, eight, nine, ten, one hundred, one thousand, ten thousand, one hundred million;

China's capital: one, two, three, four, five, six, seven, eight, nine, ten thousand, ten thousand and one hundred million.