Laurel is an evergreen tree of Lauraceae, which blooms in spring. It is native to China, similar to laurel, but different from other families. China also has the title of laurel, which is made of cassia twig, taking its fragrance and purity. During the Three Kingdoms period, there was a saying in Fan Qin's "Ode to the Past", which called "Decorate yourself with laurel trees and use the language of algae". In fact, it was to weave laurel trees to dress yourself up and spread beautiful words. Because osmanthus fragrans is fragrant and noble, people have long used it to describe and evaluate people. Emperor Wu of the Han Dynasty once asked Dong Fangshuo, Confucius and Yan Yuan who had the noblest morality. Dong Fangshuo said: Yan Yuan's morality is noble, but he is only like a sweet-scented osmanthus mountain. His morality is as mighty as the spring breeze, and everything in the world is influenced by it.