Because of the late sexual maturity of the carps, they cannot reproduce naturally in the pond. Therefore, the fry required for breeding is obtained by artificial breeding. (1) Broodstock breeding. The broodstock used for oxysterogenesis is generally derived from natural waters. Can also be artificially cultivated, as long as the water quality is good, and the feed is sufficient, the female 6th instar and male 5th instar can make the gonadal development and maturation. The broodstock cultivation pond area is 1-2 mu, and the water depth is 1.6-2.0 meters. Ten to 15 tails of broodstock are stocked per acre, and the daily feed amount can be 5% to 25% of the total body weight of the fish, depending on the water temperature and feeding conditions. Wherever there are conditions, more quail can be fed to facilitate maturation of the gonads of the broodstock. Also note that the pool should not be mixed with cod and eel; it is strictly forbidden to fertilize and keep the water fresh and rich in oxygen. (2) Fertility insemination. In the reproductive season, the mature broodstock is used for oxytocin production. The female brooding fish catches the star lightly, and the naked eye can see the grayish white dots. While the male starchasing white, hand touched a stinging hand feeling, squeezing the abdomen with a hand out of semen, females used for oxytocin should be tracking more than the star, wide distribution area, bright marriage color, abdominal swelling before and after, soft, reproductive hole congestion hematoma Big is better. For oxytocin, PG, HCG, LRH-A, and aphrodisiac drugs such as DOM can be used. The effect of using HCG alone is poor. The amount of females per kilogram of body weight was PGl5-20 pieces of carp, LRH-A30-50mg, HCG600--900 international units. Male fish halved. The females were given two injections. The first shot was 1/3 of the total dose. When the water temperature is 14°C, all the eggs can be discharged at a time, and a second ovulation can be performed within a few hours after an ovulation. The water temperature can be divided into 2-6 times in order to empty. Therefore, when the effect time is approaching, an inspection should be carried out and when eggs are found, artificial egg retrieval should be performed immediately. Accurate control of the time of egg collection is the key to the success or failure of artificial insemination. Ovicubating and harvesting can be performed simultaneously. The sperm and eggs are squeezed into a washbasin with a small amount of physiological saline in advance and stirred with feathers for about 1 minute to fully mix the eggs and sperm to complete the fertilization process. (3) artificial hatching. The fertilized eggs are first de-bonded with fine sediment-laden river water, and can also be de-adhered with milk powder. The eggs are poured into pots containing milk powder solution, stirred with feathers for 1-2 minutes, and rinsed with fresh water for 1-3 times. Can be de-bonded. The hatching method uses flow water incubation and static water cage hatching. Where conditions permit, the temperature of the water can be controlled between 19°C and 20°C. Where there is a hot spring, hatching barrels, cylinders or loops can be used to incubate water. When using the static water cage, the dissolved oxygen in the water should be kept above 4 mg/L, and the eggs should be agitated in the box every 2 hours to prevent the eggs from being accumulated long enough to suffocate. During hatching, attention should be paid to prevent the damage of water mold and sword leeches. Under conditions of water temperature of 18°C-20°C, fertilized eggs will take about 6 days to release the seedlings. Immediately after the birth of the film, the body is slender and transparent. The yolk sac is long and slightly yellow with a body length of about 1.1 cm. Most of the time, the person rests at the bottom and sometimes shakes the body to swim sideways. After 6-7 days of nutrition, it enters the mixed nutrition. At the stage, after being raised for 2-3 days, the total length can reach 1.4 cm. (4) Seed cultivation. The fry is about 1.4-1.6 centimeters in length after being stripped for about 11 days. The body is pale yellow and has begun feeding on exogenous food. The open bait uses crushed cooked egg yolks. Each 10,000 fry is fed one at a time and fed every 3 hours. Later, with the growth of the fry, the body shape approximated to fish, and there were three black stripes on the side of the body. At this time, we prefer benthic invertebrates such as otters. In the cultivation pool, a certain amount of soybean slurry can also be splashed to cultivate zooplankton for fish consumption. After about 25 days of cultivation, you can develop summer fish species.