The idioms used to describe longevity include longevity as long as Nanshan, longevity of a hundred years, longevity in the year of the turtle, and longevity in the year of the turtle.

1. Longevity Nanshan: It originates from Nanshan culture in traditional Chinese culture, because Nanshan is often regarded as a symbol of longevity in Chinese culture. The literal meaning of this idiom is that life span is as long as Nanshan, and the metaphor is that life span is very long. It is usually used on birthdays, birthdays and other occasions to express blessings and care for elders, relatives and friends.

2. A hundred years old: This idiom is usually used to wish the elderly a long life and express respect and care for the elderly. In traditional Chinese culture, longevity is one of the goals that people pursue, so many cultural symbols and images are related to longevity, such as pine cranes, longevity peaches, longevity stars, etc. Centenary life is widely used, whether in literature, art or daily life, it is often used to express best wishes to the elderly.

3. Longevity and longevity: It means to live a long life and remain healthy until old age. Ya in this idiom means far, and Ling means age. In traditional Chinese culture, longevity is one of the goals that people pursue, and symbols of health and longevity include pine, crane, turtle, etc.

4. The Year of the Turtle and the Year of the Crane: a metaphor for longevity. This idiom comes from ancient mythology. The legendary turtles and cranes are creatures with extremely long lifespans, so they are often used to wish the elderly a long life. In traditional Chinese culture, turtles, cranes, etc. are symbols of longevity.

Mythical stories about longevity:

1. The most famous one is the story of Peng Zu. According to legend, Pengzu was an ancient immortal. He had an extremely long lifespan because of his spiritual cultivation. It is said that he lived to be 800 years old. The story of Peng Zu is widely circulated among the people and has become a symbol of people's pursuit of longevity.

2. Another myth about longevity is about Magu. According to legend, Magu was a fairy who gained immortality by eating peaches. This story is related to the legend of the Queen Mother of the West. Magu was considered a disciple of the Queen Mother and therefore became a symbol of longevity.

3. There are also some mythical stories about longevity plants, such as stories about ginseng, Ganoderma lucidum and other herbs. In these stories, ginseng is regarded as a magical herb that can cure all diseases, while Ganoderma is regarded as an herb that can prolong life.

4. In Taoist culture, there is a legend about the Queen Mother, who is considered a symbol of longevity. Lu Dongbin, one of the Eight Immortals, is also related to longevity. In addition, in traditional Chinese culture, there are legends about peach trees and cranes, which are also symbols of longevity. In addition, there are longevity stories related to mythical creatures such as dragons and phoenixes. These myths and stories convey people's good wishes for longevity and health, and also express people's respect and cherishment of life.