Pine and cypress is edible and can cure some disease, people deified them and made many stories like that someone eat pine or cypress and be a fairy.

• 松柏基于其充饥、治病之效，为挣扎于灾荒中的平民所神化而创作出服食松柏成仙的故事，集中体现出服食成仙情节的现实背景。