First, the sunny pond. It is best to choose the pond at noon on a continuous sunny day, when the fry adapt to the fastest, the survival rate is also the highest. Second, strong seedlings under the pond. Before going down the pond, choose a healthy and well-balanced, lively and well-fed elite fish seedling in order to increase the survival rate. Third, the safety of the pond. Before the fish ponds under the pond must be strictly inspected whether the clear pond drugs have completely failed, we must first try to put dozens of fish into the cage inside the pond, observe a day and night, see the fry activities, whether the floating head condition is abnormal, such as the emergence of anxiety, floating head struggle, The phenomenon of stringing around shows that there are still residues of the drug in the clear pond. Fourth, "harmless" pond. Because the fry is small, the ability to resist the enemy’s harmful organisms is weak. In order to ensure the safety of fish fry in the pond, the fish must be 1-2 times thicker than the net with ponds and ponds. The harmful insects, frog eggs, cockroaches and wild fish in the pond can be removed by the organisms that may harm the fry. Fifth, timely down the pond. Premature fry is too weak and its vitality is poor. At this time, the survival rate of Xia Tang is not high. Conversely, too late fish fry have been absorbed by the yolk sac, resulting in deterioration of their physique and death. It is best time for the fish to hatch 4-5 days and be able to freely swim and feed the food in time. Six, winter and spring pond. It is a golden period for planting seedlings. Not only is the survival rate the highest in the four seasons, but it is also extremely conducive to production in the coming year. Seven, eat the next pond. In the afternoon of the first day of release, the seedlings were fed with 2 cooked egg yolks, wrapped in gauze, crushed, and washed into egg yolk to feed the fish. In the morning, one more meal was fed and the egg yolk increased to 4 and it could emerge at noon. Eight, the same batch of ponds. Each time the fish in the pond must be the same species of fish fry raised in the same batch, it is forbidden to mix fry with different specifications and sizes and with different varieties, otherwise it will seriously affect the survival rate of fry. Nine, adjust the temperature under the pond. For fry from other places, especially those fed with nylon bags, the nylon bag can be opened first, the bag placed in the pond, and some ponds properly placed, since the water temperature in the bag is relatively related to the pond water temperature. Water, after tens of minutes, can be put into the pool only when the temperature inside and outside the bag is basically the same.