These are the numerals that were used in the Oracle Bone Script
from the 14th century BC. Later numerals used in Chinese developed from
Rod numerals (筹 [籌] chóu)
Rod numerals or counting rods were a positional numeral system
used by merchants, mathematicians and astronomers from the Han
Dynasty to the 16th century.
Suzhou numerals (蘇州碼子 [苏州码子])
The Suzhou numerals system is a version of the rod numeral systems
that were formerly used in China. The Suzhou numerals developed
from the Southern Song rod numerals. They were a positional system
used as a form of shorthand in bookkeeping and accounting, and
were popular in markets, particularly in Hong Kong, until the
1990s, since when they have been replaced by Western numerals. These
numerals are also known as 花碼 [花码]
Modern Chinese numerals
The complex numerals are used on cheques, banknotes and coins and are
the equivalent of writing 'one', 'two', 'three', etc, rather than 1,
2, 3. The simple numerals are used for everything else.
Large numbers are divided into units of ten thousand, so 1 million is
one hundred ten-thousands.