Selenium rich organic yam, the essence of heaven, earth and human spirit, contains zinc, iron, selenium, unsaturated vitamin C and soluble sugar, which are several times higher than similar products. It tastes sweet, glutinous and fragrant. It is resistant to storage and transportation, and the fracture surface is free from oxidation and corruption. The wound is naturally air dried white. The delicious food is of high value. One mouthful is worth three mouthfuls.