Use old jiaozi cloth to press 1 10 or 120cM, sew the cloth edge through the rope and tie it to the bamboo piece. The bamboo pieces should be elastic. After binding the cloth strips, you can tighten the jiaozi cloth to make the bamboo pieces slightly isolated, and then add 2-3 folds to the bamboo pieces, mainly ropes that sink quickly.

In late April, the parent shrimps began to mate and lay eggs. Mating is soft-shell mating. Before mating, the female shrimp should reproduce and molt, and after the male shrimp produces sperm, the female shrimp begins to lay eggs 12 hours. The eggs laid by female shrimp are dark yellow after fertilization and attach to the empty belly formed by the curl of abdomen and tail fan. A shrimp with eggs weighing 48 grams has 326 eggs, a shrimp with high eggs has 44 1 egg, and a shrimp with low eggs has only 27 eggs.