"Yang Yi" as the core of ancient health preservation can be taken as a natural and peaceful life attitude and life style. It can be also understood as heading to the happy state beyond the tiredness of material desires. In medical and philosophical documents

the explanation is brief and mysterious; however

in ancient poems

it is abundant and vivid

especially in the aspect of how to keep peaceful mind and healthy body. In Cao Cao's works

"Yang Yi"reflects the thoughts of Daoism

such as meditation and guidance

pursuing the unity of being virtuous and meritorious and becoming immortal. "Yang Yi" appears more in the latter ancient poems as composition of cultivating spirits and surpassing hearts. It gradually becomes the health preservation thoughts of poets to surpass the annoyance in real world and get close to the essence of nature. In the development of Daoism

health preservation and becoming immortal never combines together. But in Neo-Confucianism

they melt with each other. Poems in the Song Dynasty describe the situation of cultivation and health preservation

leading "Yang Yi" to ordinary people

improving health preservation thoughts in medical field and becoming the powerful complement and elucidation to ancient health preservation thoughts.