The number three as a numeral is certainly very common in ancient poetry. Like the numerals such as "wan" and "qian", the word "three" has a wide range of sexual applications in Chinese, and it is also used in "three" in ancient poetry. "Sometimes it is an approximate number, not precise, but generally refers to many. In this way, "three" has a wide range of applications. It can be said that the application of "three" does not have a deep relationship with ancient poems and famous sayings. This phenomenon is more Deeply due to the Chinese language environment in which ancient poems and famous sentences are placed, it is Chinese habits that have created a large number of "three" appearances.