There has always been a folk custom of tasting three delicacies in long summer, which is divided into three delicacies: ground, tree and water. The three fresh plants are broad bean, amaranth and cucumber (amaranth, wheat, broad bean, amaranth, broad bean and garlic sprout); Three fresh trees are cherry, loquat and apricot (one is plum, apricot and cherry, and the other is plum, cherry and toon head); The three kinds of fresh water are marine fish, puffer fish and shad (shad, shad and yellow croaker, as well as shad, whitebait and mackerel). Among them, tasting fresh land is the most common.