Harvest time: from early October to the following four standard can harvest, to dig tuber, remove dirt, they, cut to reed head, wash, flooding 2 ~ 3 hours, take out, with bamboo knife to cut skin, sun, to all dry. Efficacy: the spleen, fill lung, solid kidney, benefit jing, used to discharge the spleen deficiency diarrhea, long dysentery, virtual fatigue cough, thirst, spermatorrhea, down, urinate frequency. Bouquet: gas micro, taste light appearance: white or off-white fine powder