Cao Jinghua's "health-preserving prescription" contains four kinds of traditional Chinese medicines: American ginseng, Dendrobium, Notoginseng Radix and Salviae Miltiorrhizae Radix, which has remarkable effects on preventing cardiovascular and cerebrovascular diseases and regulating sub-health state of human body. Because of its complete retention of granular components and high content of effective components, it has the advantages of "better absorption and convenient administration".