Many fake shark's fins are made from low-cost winter powder or fish skin mixed with gelatin, and some are bleached with industrial hydrogen peroxide, which is not only not nourishing and nourishing to the body, but also easy to negatively affect the body. Therefore, people can follow the five steps of "looking, smelling, tasting, tearing, and pulling" to identify fake shark's fins before purchasing or consuming them. Identifying real or fake shark's fin is often a favorite discussion among gourmets. Some people have been eating shark's fin for many years without realizing that what they are eating is synthetic "fake shark's fin. The color of real shark's fin is natural and rich in layers, while the color of bad quality shark's fin is transparent, white, without layers, and looks like the texture of plastic. 2. Smell: Shark's fins bleached with medicated water or hydrogen peroxide will have a slight medicated odor. 3. Taste: The natural water-foamed shark's fins have a delicate taste, with clear silk and soft Q. The drug-foamed shark's fins are very hard to bite down and hollow inside, which tastes like plastic. 4. Tear: Pure water-foamed shark's fins have a clear texture, while drug-foamed shark's fins are thicker and can't be torn with chopsticks. 5. Pull: The shark's fins foamed with natural water are more elastic and will be as flexible as rubber bands after cooking; while the shark's fins foamed with drugs will be broken as soon as they are pulled due to the destruction of the organization. When it comes to the production method of fake shark's fins, Wang Jiazhuang said that in addition to identifying the real shark's fins, the foaming process of the shark's fins is also very important. If the natural water foaming, it will be swollen to 2 to 2.5 times the weight of the foaming before the foaming, and if the medicated water foaming, the shark's fins can be swollen to the original 3 to 6 times the weight of the foaming, and the two are compared to each other, and of course, the medicated foaming of the shark's fins can save a lot of money and the speed of the foaming process is faster than the natural water foaming. Foaming of shark's fin is the process of cooking. The foaming of shark's fin is a very important part of the cooking process, which not only affects the taste of the dish, but also has an impact on the health of the customers. For example, Taipei Top Shark's Fin Restaurant or Xing Shark's Fin Restaurant, where I am currently working, insists on using the natural way of foaming to preserve the flavor and gelatin of the shark's fins.