Its nature is flat and sweet, and it has the effect of warming the stomach and strengthening the spleen. It is one of the delicious dried fruits often used as soup in Guangdong and Hong Kong. Also known as apples and Eichhornia crassipes, they are shaped like black-shelled eggs. Fruit is rich in starch, fat, sugar, protein and various vitamins. Boiled or fried, it tastes like chestnuts, and the cooked food is fragrant and can be used as cooking ingredients. As mentioned in The Journey to the West, Emperor Taizong gave a banquet in honor of four Tang monks who returned from the scriptures, and Pingguo was one of the delicious dishes. Apple fruit also has certain therapeutic value. According to legend, Harry, a loyal minister of the Ming Dynasty, was seriously ill. His friend sent him a basket of apples and cooked porridge several times, and he soon recovered. Apple leaves can give off a faint fragrance and are favored by farmers in Huizhou, Guangdong Province. They are often wrapped as gifts for relatives and friends.