Dandong Ergong flying crab refers to a kind of swimming crab with different sizes. Among them, "Er Gong" refers to the size of crabs, that is, the yellow and fleshy parts of crabs. This kind of crab is produced in Donggang, Dandong, Liaoning, China, and is a delicious food on people's table. Every spring and autumn is a good time to eat this kind of crab. At this time, the flying crab paste is full of yellow fertilizer and is deeply loved by people.