What number does the tail represent?

Answer: it is 9. Numbers have tails, and the last largest number is the tail, which is 9. "Nine" is the extreme of yang number, which often represents the most and is also the limit. For example, under the cloud nine and the underworld, it is the supreme number. In ancient China, nine was regarded as a symbol of authority, and only the emperor could use it. For example, the emperor called the ninth five-year plan supreme, and he had to knock three times and worship nine times to see the emperor. There are nine ministers around the emperor, nine officials in the imperial court on the right, and nine gates in the whole capital.