Scientific name: Dry date (hong gan zao) Botanical name: Ziziphus jujube Mill. Var. Inermis(Bunge) Rend English name: Date, Smooth Jujube Estimated yield this year: 100ton Collecting time: Aug. To Sept. Dry Big Date is big and thick, it appears mauve, it tastes sweet and fine. This kind of sweet date is full of hygienical functions, for example, to invigorate the spleen and disperse the depressed liver-energy, to mointurize the face by enriching the blood, prolong lives, etc.