Daoyin is an ancient Chinese body-mind exercise originally aimed at health care as well as physical and spiritual purification. The ascetics of past time believed it could be used to obtain the “eternal youth” (changsheng bulao). The first historical reference about it appears in Zhuangzi, a Taoist text written between the 4th and 2nd century BC:
Breathing in and out, exhaling and inhaling, they get rid of the old to absorb the new. They swing like bears and stretch like birds – all this they do in order to have long life. They are Daoyin disciples, people who nourish their form seeking for longevity like Pengzu.