An Tiem was a young intelligent and hard-working slave. The King greatly appreciated him. So he gave him a good job and an official title. But An Tiem became rich and arrogant. Dissatisfied with him, the King banished him and his family to a sandy island. Fortunately, a bird brought some seeds that he succeeded to grow. He obtained so tasty fruits that he sold them well and became rich again. Admiring his talent, the King recalled him to the court. The fruit, which grow in the sand, called tay qua (coming from the West) is named also dl1a hau, dl1a do, baticha-pateca-pasteque, sweet melon, water melon, musk melon, is a Citrullus from the family Cucurbitaceae. It contains hight crude protein levels, vitamins, amino and anteiso acids, fat, sugars (sucrose, galactose)... in kernels, especially in his oil. His juice inhibits the action of the digestion enzymes. It may be reasonable to be taken by kidney-diseased persons as a medicine. Water melon frost dissolved with other plants in menthol and borneol make a beverage which has blood circulation promoting, analgesic, antitussive effects...