At present, there is only one kind of Songhua River shrimp left, the name of this shrimp is called mole cricket shrimp, I believe many northeastern people have heard of. There are a lot of such shrimp in the Songhua River on the Bund, used to be wild, and then eaten by the eaters ate into the endangered species, people began a large number of artificial breeding, but raised shrimp meat is not as delicious as the wild, just at this time and the emergence of crayfish, Chinese eaters turn their attention to crayfish, and slowly forget this kind of mayfly shrimp.

Because this kind of shrimp like to drill into the mud and sand inside, and the movement is particularly agile, once someone wants to catch, it will quickly drill into the hole.

So fishermen find a way to put the hairy end of the brush into the hole, mayfly shrimp will climb on the tip of the brush, see the brush movement, quickly pull out the brush, you can easily catch it.