What are shark's fin, bird's nest and abalone?

Shark fin is dried shark fin. Shark's fin, also called wing, has always been regarded as a noble food in China, belonging to one of the "eight treasures of seafood". Every sumptuous banquet, without shark fin, is not enough to show solemnity. It is rich in nutrition. According to the "Test of Medicinal Properties" and other books, it can replenish blood and qi, tonify kidney and moisten lung, and stimulate appetite. Every 100g shark fin contains 83.5g of protein, 0.3g of fat and 337kcal of heat, which is a precious nourishing treasure. Shark fin bones are soft and delicate, rich in nutrition, and mainly contain glial protein. It has the effects of invigorating qi and blood, tonifying kidney and lung, and is mainly used to treat various chronic fatigue diseases.

Bird's Nest, also known as Bird's Nest, is a nest and nest made of mucus and feathers secreted by the digestive gland of the stomach after Jin Siyan and the swallows of the same genus ate fish, seaweed and other creatures in the sea. Bird's nest is not only as famous as bear's paw and shark's fin, but also an advanced tonic.

Abalone, called fish, is actually not a fish, but a kind of shellfish, a mollusk with an oval shell crawling on the rocks. Whether cooking or making soup, it has a unique flavor. In China, it has always been listed as a treasure in the sea. Abalone was called "gun" in ancient times and "general's cap" in common name. The shell is thick and low, flat and wide, ear-shaped, and the spiral part only leaves traces, accounting for a very small part of the whole shell, and the meat is hidden in the shell; Feet are quite developed, accounting for 40% of body weight. Haliotis discus hannai produced in Shandong coastal area is the top grade of abalone. Haliotis discus hannai lives in a shallow sea with high seawater transparency, gentle tidal current and lush seaweed, or in a corner of an island canyon. It doesn't sleep during the day, comes out at night and feeds on seaweed. The meat is delicious, fresh but not greasy, clear and powerful. Every 100 abalone meat contains 40g of protein, 0.9g of fat and 33.7g of carbohydrate. It also contains many vitamins. Chinese medicine believes that it is salty and warm, and can regulate menstruation, moisten dryness and benefit intestines. Abalone shell has the effects of clearing away heat, calming the liver, suppressing yang and relieving stranguria. The inner surface of its shell is bright in color and can be used as mother-of-pearl embedded in furniture.