1. Generally, shrimps are cooked with hot water, because the surface of shrimps is cooked quickly when boiling water enters the pot, which keeps the vitamins in shrimps well, and at this time, the enzymes in shrimps can also be eliminated. If cold water is put into the pot, some nutrients will dissolve when the enzyme reaches the standard temperature. Boil the cold water first. As soon as the water passed, the shrimp served. Shrimp will change color quickly. Boil the water again and you can cook it. Cold water, but it will be very old. It is very important to add ginger slices and a little rice wine when cooking.