Black raisin grows in Xinjiang area, which is the worlds best place for planting grapes. With the great conditions of 16 hours longtime sunshine, average 20 difference in daily temperature, irrigated by melted snow water and the alkaline soil there. Grapes are cultivated with full photosynthesis and therefore more sugar in the fruits. They are dried naturally by wind at the mature stage, and proceeded in the Dry House by the sun. Its also called dry grapes.