Tang Dui is the local name of sugar-coated haws on a stick in Tianjin. It is also a kind of traditional snack of China. Haws on a stick are coated with malt syrup, which quickly hardens outdoors in winter. It tastes sour, sweet and a little cool. The distinctive snack commonly known in northern China had been cooked since the Song Dynasty according to records in "Annual Customs and Festivals in Peking". Popular snacks made of haws, crab apples, grapes and Chinese yam with walnut and sweet bean paste, etc, were very common in tea houses, theatres and streets. Besides, it also helps on appetizing, skin nourishing, and a number of other health benefits.