Which yellow meat variety sweet potato eats sand sweet?

Sweet potato in yellow-skinned sandy land of Yulin. The sweet potato in the yellow-skinned sandy land of Yulin is sweet because of its variety. Sweet potato contains dietary fiber, carotene, vitamins A, B, C, E, potassium, iron, copper, selenium, calcium and so on. With high nutritional value, it is the champion of "Top Ten Best Vegetables" selected by the World Health Organization.