First, the set of conditions 1. Pond selection: should choose a quiet place, the pool shape is rectangular? Best east-west direction, each area of ​​4.5 to 10 acres, pool depth of 1.5 to 2.0 meters, adequate water, water pollution, drainage system support? The water inlet is made of a metal mesh cover and a water outlet made of a 100 mesh mesh cloth to prevent baggage from entering into other fish. There is aeration of 1.5 to 3 kilowatts or microporous aeration facilities. 2. Ecological creation: The pond should be planted with water plants such as Elodea and Yellow silk grass. The water peanuts in the area of ​​1 to 2 meters around the pool should be controlled within 5% to 10%. Conditional farmers can put ponds in the pond. Part of the shading net is used to cover a quarter of the fish ponds. Since the initial stage of crab breeding, the water depth is generally controlled at 60 to 80 cm, and the water level in June to July is adjusted to more than 1.5 meters. The yellow snapper prefers low light feeding. , This period? 3~6 months need shading. 3. Disinfection of fertilizer and water: The requirements of the pond are not strict, but the requirements for water quality are strict. Generally, 15 to 30 kg of lime per acre is used to disinfect 10 to 15 days before the seedling is injected. Avoid the shelling period of crabs. After three days, put into fermented and decomposed organic fertilizer, 100 kg per mu, and use fertilizer to hydrolyze toxin once. Second, aquaculture technology 1. Reproductive seedlings: The crabs have been stocked before the end of February. From March to April, we can put 10 to 15 grams of each piece of winter seedlings directly into the pond. From June to July, we can put large-size summer flowers at 3 kg per mu. 2. Feed feeding: Stingrays are omnivorous fish. Normally, crab ponds are fed with pellet feed and small trash fish. The crabs eat the rest of the feed is enough, no need to feed individually, to 9~ October can be fed stingray special feed, feeding amount of 2 to 7%. Cosmetics are compound mixtures made from various raw materials after reasonable blending and processing. There are many types of cosmetics raw materials with different properties. According to the raw material properties and uses of cosmetics, it can be roughly divided into two categories: base raw materials and auxiliary raw materials. The former is a main raw material of cosmetics, which occupies a large proportion in cosmetic formulations, and is the main functional substance in cosmetics. The latter is responsible for shaping, stabilizing or imparting color, fragrance and other characteristics to cosmetics. These substances are not used in large amounts in cosmetic formulations, but are extremely important. Cosmetics are chemical mixtures made of natural, synthetic or extracted substances with different functions as raw materials and processed through production processes such as heating, stirring and emulsification. Salicylic Acid, Hyaluronic Acid, Alpha Arbutin, Arbutin, kojic acid, kojic acid dipalmitate Xi'an Gawen Biotechnology Co., Ltd , https://www.ahualyn-bio.com