Walnut hometown after Iran, the Han Zhang Qian Han Dynasty in western Asia back to China. 1, according to the country of origin of walnut distributor, has the cover of walnuts, Hinata walnut, wild walnut; 2, according to maturity classification, walnut summer, autumn and walnuts; 3, according to the degree of classification Nutshell smooth, light walnut, hemp walnut; 4 Press husk thickness classification categories, namely, walnut shell and thick shell walnuts. China has a walnut species, according to "China walnut," a book that will our existing plants divided into 3 groups walnut eight kinds (including introduction from abroad and has been found in natural hybrids). Walnut Group: walnut, iron walnut Juglans mandshurica Group: Manchurian walnut, wild walnut, hemp walnut, walnut Keppel, heart-shaped walnut. Black Walnut Group: Black Walnut. The efficacy and role of walnuts: Walnuts antioxidant called the "king" of the American Dietetic Association recommends people eat two or three times a week is best walnuts, especially the elderly and postmenopausal women, because arginine contained walnuts, oil acids, antioxidants, such as walnuts on cardiovascular protection, prevention of coronary heart disease, stroke, Alzheimer's, etc. is quite helpful. Do not eat too much once someone walnuts delicious, otherwise it will affect digestion. Some people like to brown the surface of the thin-skinned walnut stripped walnut manufacturers, it will lose some nutrients, so do not peel off this skin of walnut wholesalers, walnuts, fruit from Qingdao Jiang Shan Jiang Shan Wong association Fruit Co. available. Qingdao Fu Huang Jiang Shan association Fruit Co. (www.hfd-js.com) strong, credible, in Qingdao, Shandong nuts, dried fruit industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead to break into the glorious mountain and you work for a better future!