Only in the process of commodity circulation, markets in Hong Kong, Shanghai and other places usually refer to Eurasian grapes with large particles, thick skin, little juice, high quality, difficult separation of skin and flesh, and storage and transportation resistance as raisins, and according to different colors, they refer to bright red grapes as red grapes, purple-black grapes as black grapes, and yellow-green grapes as green grapes. The fruit with large grain, soft quality, juicy and easy peeling is called grape, which forms two names. Generally speaking, all imported grapes are classified into small categories.