Changyi City is close to the Laizhou Bay of the Bohai Sea. The coastline is 53 kilometers long, with 640,000 mu of tidal flats in the intertidal zone and 3 million mu of shallow sea surface within 5 meters of the isobath. The individual prawn is large and flat, the surface is smooth and transparent, the color is bright, the shell is thin and hard, the meat is tender and delicious, the male is yellow, and the female is blue-blue. After cooking, the whole body is orange red, rich in flavor and has distinctive regional characteristics.

Changyi City is close to the Laizhou Bay of the Bohai Sea. The coastline is 53 kilometers long, with 640,000 mu of tidal flats in the intertidal zone and 3 million mu of shallow sea surface within 5 meters of the isobath. It is a warm temperate semi-humid monsoon region with a continental climate, four distinct seasons, sufficient sunshine, simultaneous rain and heat, and a dry and wet season. Compared with inland areas of the same latitude, it has the characteristics of warm winter, cool summer, cold spring and four distinct seasons. . The annual average illumination of Changyi City is around 2750h. The temperature of seawater in the four seasons is between 0°C and 28°C, and the seawater salinity is 12‰-35‰. Due to the influence of the Weihe River into the sea, the bottom of the seabed is mostly sandy and muddy, the water quality is fertile, the bait is very rich in biology, and the special natural environment of the place of production. The Chinese shrimp has a large body, delicious taste and rich nutrition, forming a unique The quality, its taste is far superior to other products in the production area, together with oysters, Changyi wenyu, Changyi scorpion crab and known as the "four famous fresh" of Laizhou Bay. Cultural background According to legend, during the Qing dynasty, when the Empress Dowager Cixi was in charge of politics, the close-knit waitress Cui Gu around her reached the age of marriage, but the Empress Dowager Cixi refused to let her go. Cuigu’s uncle did not want to see the prostitute’s youth in the palace. Using a batch of orange-red and delicious wild big prawn from Changyi, a dish was designed for Cixi. After the Tsing of Empress Dowager Cixi, it was only half a day to understand that it was Cuigu’s uncle who called his niece to go out to plead, but she still Don't let Cui Gu go home. A few years later, the Empress Dowager Cixi was afraid of falling into anonymity in the future, and she was allowed to marry Cuigu out of the palace. The incident was transmitted to the Baqiying barracks in the firearms battalion. The merchants on the Nanmen Street of the Lancang Plant sold the wild prawn caught in the Changyi sea area. From then on, the name of the prawn and the court for the palace ladies were released. The delicious dish "Red Bride Matching" was handed down in the folk. Cultural accumulation “Changxiu Prawns” is the crown of shrimps with its individuality, tender meat and delicious taste. At the same time, as one of the “eight treasures” of seafood, large shrimp is also a traditional export aquatic product in China and enjoys a good reputation in the international market. "Changyi County" records: Changshen P. prawn has a long history in the history of its large size, delicate meat and delicious taste. According to the "Changyi County Aquatic Records", Changyi is a coastal county with a long history of marine fisheries. As far back as the Spring and Autumn Period, “Du Chang has become famous” when “Zhong Zhongqi is in harmony, and Qi Fuqiang is the benefit of fishing salt”. Changyi Sea Area is famous in the history of producing large wild prawns. Its abundant production, excellent texture and distinctive features make it one of the main aquatic products for local fishermen. "Changyi Culture Expo" introduces the large prawn (Prawn prawn), which is 12-18 cm long and 20-50 g in weight. The life cycle is one to three years. Because the coastline of the Bohai Bay is elliptical, the waters of the Changyi area are at the southernmost point. Therefore, the water temperature in this water area is warmer and the waves are smaller. It is most suitable for the growth and reproduction of the shrimps in the Bohai Sea, so it is called the most dense growth area of ​​the shrimps in the Bohai Sea. Bohai shrimp has good meat quality, thin shell, high edible ratio and bright color. It has been exported to foreign countries in the 1950s. Brand Construction Changyi City has successively participated in the formulation of the National Geographical Indication Protection Product “Quality and Technical Requirements for Changshang Prawns” and the “Changxi Prawns” local standards in Shandong Province and Changyi City, and successfully applied for the special logo of the geographical indication products of the giant prawn. And with Changyi Haifeng Aquaculture Co., Ltd., Changyi Xiaying Port Management Co., Ltd. and other enterprises to sign the contract for the use of special logos for the geographical indication products of the giant prawn, to further standardize the fishing methods, sensory, physical and chemical indicators and product specifications. The series of standards have improved the fishing and breeding methods and management techniques of the prawn, and laid a solid foundation for the standardization and large-scale production of the prawn of the city. In 2009, the prawn (both live and non-living) was officially registered as a geographical indication certification mark by the State Administration for Industry and Commerce. In 2011, the prawn was officially registered as a GI protection product by the General Administration of Quality Supervision, Inspection and Quarantine. There are 23 pollution-free production bases and standardized production bases in Changyi City, 4 original and good breeding farms and 10 nursery farms. As a well-known aquatic product, Changyi Big Prawn has a long history of fishing and breeding. In the 1950s and 1960s, the annual output was generally 100,000-300,000 jin. After the 1970s, it increased to 20-500,000 jin. . In recent years, with the government's use of the proliferation and release of "Changxi large prawn", the natural resources of large prawn have increased, and the output has been stable at more than 500,000 jin per year, with an output value of 30 million yuan. “Changyi Big Prawn” was given to the elderly as a longevity and auspicious thing in the Changyi area. The market recognition is high and it is also a must-have for the feast of the festive season. It is mainly sold to more than 20 cities and regions in China, such as Beijing and Tianjin. For a long time, Changyi City has continuously improved the scientific service capacity of the fish culture of Changsong P. chinensis, and has close business contacts with well-known research institutes and universities in China such as the Yellow Sea Fisheries Research Institute of the Chinese Academy of Fishery Sciences, the Institute of Oceanography of the Chinese Academy of Sciences and the China Ocean University. In 2010, the demonstration and promotion of Chinese shrimp rapid propagation and breeding increased and won the third prize of Shandong Agriculture, Animal Husbandry and Fishery Harvest Award, 2009-2012 “Changduo Prawn”, “Changyu Shrimp”, “Four Holes” and “潍” The “Golden Fish”, such as the China Geographical Indications Certification Mark and the “Changyi Shuttle Crab” geographical protection products have all been awarded the Changyi Municipal Government's reward knowledge. The prawn is not only nutritious but also highly medicinal. The rich magnesium in shrimp has the function of regulating heart activity, protecting the cardiovascular system and preventing arteriosclerosis. At the same time, it can also expand the coronary artery to prevent high blood pressure; the other trace element contained is astaxanthin, which is the strongest antioxidant found so far. Widely used in cosmetics, food additives, and pharmaceuticals.

Technical requirements for the quality of P. chinensis I. Provenance Chinese prawns (fenneropenaeus chinensis). Second, the production method of natural fishing. 3. Sources of shrimps 1. Artificially increased flow: In September, artificially increased flow of shrimps bred by naturally-bred broodstock began. 2. Wild. IV. Fishing Every year from September to May of the next year, fishing is carried out by spurting nets and trawling nets. Mesh size ≥ 5cm. V. Quality Features 1. Sensory features: The surface is smooth and transparent, the color is bright, the body grows large and the side is flat, and the shell is thin and hard. Males are yellowish brown and females are turquoise. The meat is delicate, tight and elastic, and has a unique taste. It has the inherent flavor of seawater shrimp. 2. Physical and chemical indicators: Adult shrimp body length 12cm to 18cm, monomer weight ≥ 45g. Moisture ≤ 81.0%; fat ≤ 0.7%; protein ≥ 17.5%; calcium ≥ 1300mg / kg; zinc ≥ 13mg / kg. 3. Safety and other quality technical requirements: Product safety and other quality technical requirements must comply with relevant national regulations.

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Producers within the scope of production of the prawn prawn can submit an application to the Quality and Technical Supervision Bureau of Changyi City, Shandong Province for the use of the “Special Mark for Geographical Indication Products”, which is reviewed by the Shandong Provincial Bureau of Quality and Technical Supervision and reported to the General Administration of Quality Supervision, Inspection and Quarantine for approval. . The statutory testing agency for the main shrimp of Changyi is designated by the Shandong Provincial Bureau of Quality and Technical Supervision.