Why are the crabs in Qinhu Lake called "fat crabs"? The so-called "hairpin" is to insert a row of bamboo slices vertically into the water to stop the returning crabs and catch them. The families of these crabs are at the mouth of the Yangtze River. Every February and March, spring blossoms and crab seedlings hatch from wintering eggs. Although these small animals, which are like spiders and transparent, are less than a penny, they have started their first adventure in life and have grown up through several transformations on the way. Young crabs swim upstream and enter inland rivers one after another to find a place to live. Qin Lake has a gentle water flow, and the mudflats along the coast are especially suitable for their burrowing growth. In addition, the water quality here is pure, the climate is mild and there are many grasses, so the crabs in Qinhu Lake grow rapidly, with tender meat, rich paste and particularly delicious taste. Every August and September, mature crabs leave their second hometown one after another and return to their "mother's house" to mate and lay eggs. As soon as the returning strong crab touched the bamboo foil, it diverted to climb to both sides and fell into the fisherman's preset basket.