How about this number 9?

The meaning of "sacred" and "auspicious"

Nine is homophonic with the Chinese character "Jiu", so nine is regarded as a number representing the dragon.

The number "nine" is closely related to ancient myths and legends. At first, it was a dragon-shaped totem culture, which later evolved into "sacred" and "auspicious" and was widely borrowed. The Book of Changes divides one to ten into odd and even numbers. According to the ancient theory of Yin and Yang in China, odd numbers are Yang and even numbers are Yin. Odd numbers symbolize heaven, masculinity, even numbers symbolize earth and femininity.

Because nine is the largest single digit, it is considered as the imaginary number and limit number of the sun in China, which often means the most and countless meanings, such as: nine days/nine days of clouds/nine days of white clouds (to describe the sky is very high), nine plates (to describe Panshan Road), nine quietness (to describe extremely secluded and deep places), nine Niu Yi hairs, nine deaths, and nine returns to one place.

There are many things in China culture that like 9 or multiples of 9. Such as: Jiu Lianhuan, Jiu Bai Yin's ancient trick, Eighteen Palm Dragon Map (2×9= 18), Thirty-six Plan (4×9=36), Seventy-two the Monkey King (8×9=72), Eighty-one Difficult (9×9=8 1) and so on.

In addition, nine is homophonic with the Chinese character "Jiu", so nine is regarded as a long-lasting number. In some areas of China, when the groom goes to his spouse's house to marry the bride, he must give the bride's family, relatives and friends a red envelope of 9999 yuan (or more "9") to show his long-term intention before entering the bride's house.