China people are the first people in the world to adopt decimal notation. The symbol "zero" was originally produced not to express "nothing", but to make up for the vacancy in decimal notation. Since the 7th century, China began to use the word "empty" as a symbol of zero. However, the zero in ancient China was a circle, not a oblate zero commonly used in modern times. Indo-Arabic numerals, including the now widely used χ, were introduced to China from the west by Muslims in the 3rd century A.D./kloc-0, and the χ in China has been used for 100.
Ptolemy of Greece was the first person to adopt the flat circle number 0. Because there was no value system in ancient Greece, zero was not very urgent. However, when it is used in the 60-digit system of angle, it is very clear to use the flat circle number 0 to indicate the vacancy. But Ptolemy's 0 did not participate in the operation as a number, nor was it used alone.
Indians were the first to participate in the operation with zero as the number.
They adopted the decimal numerical counting method very early. Initially, vacancies were indicated by spaces. Later, in order to avoid the trouble caused by unclear reading, a small dot was added to the space, such as 5.8 of 508. In 876 AD, a stone tablet was found in Guaril, India. The above figures are very similar to modern figures, and may be the earliest basis for developing from a small point to a small circle where 0 represents zero.
Indians admit that zero is a number and use it to participate in operations, which can be said to be a more important contribution to the discovery of zero.
After a long time, Indian numerals were introduced into Arabia and developed into the Indian Arabic numerals we use today. But it was not until 1202 that the Italian mathematician Fibonacci introduced this number (including 0) into Europe, and the modern concept of zero and the zero in Indian Arabic numerals gradually became popular all over the world.