3040 prawns and 4050 prawns, 3040 prawns are big.

The reason shrimp 3040 is large is because 3040 represents the number of shrimps per kilogram is 30 to 40, and 5060 represents the number of shrimps per kilogram is 50 to 60. According to the division method in elementary school, the larger the number, the greater the number of shrimps. The smaller the shrimp, the cheaper the price. The smaller the number, the larger the shrimp and the more expensive it will be.

The way to preserve shrimps is to put them in clean water. If the purchased shrimps will be cooked and eaten soon, they can be stored in clean water to ensure the freshness of the shrimps. , can also prompt the shrimp to spit out the sediment in the body. The second is to freeze and store in the refrigerator. If the shrimp cannot be eaten in a short period of time, it needs to be stored in the freezer layer of the refrigerator. Since the shrimp is rich in protein, it is easy to deteriorate when stored in the refrigerator, so it needs to be cleaned and frozen before storage. Guaranteed freshness.