Ginkgo biloba bioflavonoids glycosides can effectively fight and scavenge free radicals, and the content of ginkgo biloba flavonoids is above 24%. Ginkgolides can selectively treat antiplatelet active factors. Platelet active factor is a strong endogenous active substance in human body, which can cause platelet aggregation and thrombosis, and is a hidden killer of cardiovascular and cerebrovascular diseases, stroke and myocardial infarction. Ginkgolide is the bane of platelet active factor, and its content is above 6%. Youqingsu has the effects of delaying aging and improving memory. The ginkgo organism "Youqingsu" extracted from female Ginkgo biloba leaves is the first in China.