Chengcunyu belongs to Yangxitun, and there are more than ten places in Chengxi Village, Xitou, Confucianism, Shaying, Weaving, etc., which are most famous in the village of Chengcun. Cheng Cunyi's characteristics are large, sweet and fresh. It is significantly different from the cockroaches produced elsewhere. Chengcun Market is at the mouth of the Fengtou River and the Zhihe River.

[Culture Background] Oysters are commonly known as “蚝” in Guangdong. They are high in economic value, rich in nutrients, and delicious in meat. They are known as “sea milk”. Its meat was once considered to be "the most expensive of the sea people" in ancient times. As a kind of food that people love, it has been recorded in history. "The Five Mountains" wrote: "The top of the poor mountains, the water Wrong, the oyster of the south, the bear's paw of the north, ...", the oyster and the bear paw in the eight Jane. The southern oyster is also the most full, soft, smooth, fleshy, elastic and delicious in the ocean. [Cultural Precipitation] Chengcun Town has been cultivated for more than 180 years. It began to adopt traditional methods such as sowing and cutting. Later, with the guidance and assistance of the fishery authorities at all levels, the shed was used since 1995. Hanging column breeding method. The cultivation method of scaffolding hanging column is simple, the growth of alfalfa is easy and fast, the per mu yield is increased, and the breeding cycle is shortened by one year. However, due to the heavier cement column, this method not only increases the weight of the cubs, but also is inconvenient to operate. In 1997, Chengcun Shannong began to use the plastic rope to stick the scaffolding sling culture method. This farming method is to first remove the seedling from the fixed base, and then imitate the characteristics of the natural scorpion fixed with the left shell. The left shell of the seedling is a sticky place, and the seedlings are paired with a seedling rope and glued to a 2m long rubber string. There are 8-10 sticking points on the rubber rope, and the shell height of the seedlings is perpendicular to the seedling rope when sticking. 8-10h after sticking, after the cement is hard and dry, the string is moved to the shack of the breeding area for hanging. The method has the advantages of simple operation, convenient and convenient operation, greatly improved the hanging density of the raft, reduces the weight of the rafting frame, and can also utilize the wind resistance of the rope, increase the feeding space of the hoe and prolong the feeding time of the cockroach. This kind of hanging mode makes the large cockroaches that are hoisted more easily and quickly, and the size of the growth is uniform. It achieves the best effect of the seedlings that were put into production that year, and the yield per mu is also greatly increased. Like, this kind of hanging mode is widely promoted and applied by the majority of farmers. [Brand Building] In order to promote the culture of Chengcun, protect the regional and quality characteristics of Chengcun, and promote the healthy development of Chengcun's industry, the Yangxi County Government and relevant departments have made active efforts through many efforts. Has laid a good foundation for work. 1. Increase the publicity of Cheng Cunxin and improve the social influence of Cheng Cunxin. In order to improve the social influence of Cheng Cunxin, in 2002 and 2003, Yangxi County successfully held two consecutive Chengcun Food Festivals, which improved the visibility of Chengcun, standardized the behavior of Chengcun, and promoted Cheng Cunxin. The healthy development of the industry has played a positive role. 2. Strengthen the protection and construction of the Chengcun seedling base. In order to better adapt to the development and growth of Chengcun's aquaculture scale, the problem of supply and protection of local natural seedlings in Chengcun was solved. The Yangxi County Party Committee and County Government strongly supported Guangdong Hualong Group to build a marine aquaculture seedling center in Chengcun Town, and promoted the company's cooperation with Guangdong Ocean University to carry out artificial breeding of Chengcun and artificial breeding of triploid Oyster oyster. At the same time, Yangxi County cooperated with the South China Sea Institute of Oceanology of the Chinese Academy of Sciences to carry out research on rickets prevention and control technology and provide technical support for the healthy and sustainable development of the cultivating industry in Chengcun. 3. Vigorously push the standard farming technology in the village. In 2001, the National Quality Supervision, Inspection and Quarantine Bureau of the State Administration of Quality Supervision, Inspection and Quarantine, jointly administered by the Yangxi County Quality Supervision Bureau and the Yangxi County Ocean and Fishery Bureau, settled in Chengcun, Yangxi County. The Comprehensive Standard for Oyster Oysters, which was drafted by the Office of the Leading Group for the Construction of the Oyster Oyster Standardization Demonstration Zone in Yangxi County, was issued on October 1, 2002; the product standard of Cheng Cunxin was also on March 15, 2005. Released for implementation on the day. This will prompt Cheng Cunxin to enter the development track of scientific and standardized production. 4. Implement the fishery science and technology household project of the Ministry of Agriculture, and promote the production and production of the village. In 2005, the first year of the implementation of the fishery science and technology household project by the Ministry of Agriculture, Yangxi is one of the five demonstration towns for fishery science and technology in the country. It is also the only fishery science and technology demonstration county in Guangdong Province, and Chengcun is the main breeding species. Among the five national fishery science and technology demonstration counties in the country, only Yangxi County is based on the Oujiang oyster-Chengcun. 5. Committed to technological innovation and providing policy protection. In recent years, the Yangxi County Party Committee and County Government has attached great importance to the development of the farming industry in Chengcun, and has cooperated with the South China Sea Ocean Research Institute of the Chinese Academy of Sciences, Zhejiang University, Jinan University, and Guangdong Ocean University to carry out research on the prevention and treatment of rickets. Provide technical support for the sustainable development of the aquaculture industry; also issued the “Notice on Demarcation of the Origin of Chengcun Village” (Xifu [2003] No. 3) and the “Notice on Strengthening the Environmental Protection of the Culture of Chengcun” and established Yangxi Chengcun Bay Provincial Marine Ecological Protection Zone. Investigate and punished the encroachment of navigation channels, irregular farming operations and destruction of aquaculture resources and environment, increase the environmental protection of Chengcun's production areas, stipulate the regional scope and protection measures of Chengcun's origin, and give Chengcun the regulations. The development of the aquaculture industry provides a concrete and powerful guarantee.

Cheng Cunyi quality technical requirements (1) breeding conditions. Choose calm and calm, the seawater contains more species of unicellular algae, the bait is rich in biomass, and the brackish water meets and exchanges a large amount of harbor. There are mangroves and grassy beaches distributed in the high tide areas along the coast. The water temperature ranges from 6 ° C to 32 ° C. The specific gravity of seawater is between 1.005 and 1.023. Salinity is 8‰ to 30‰. The water depth is -2m to 8m below the low tide line. (2) Seedling cultivation. Seedlings are collected in summer and seedlings are harvested in autumn. From April to May each year, Xia Miao puts on the seedlings before and after the Ching Ming Festival, and the autumn seedlings release the seedlings from August to October every year. Choose a seed with a shell length of 5mm or more, a color that is mainly brown, grows flat, and the shell edge does not lift. When the juvenile shells of the seedlings are up to 5 mm in length, the seedlings are transferred to the holding area in time for hanging and holding. (3) Breeding. The pile-type hanging method is adopted. The length of the seedling section of the seedling rope is 1.0m, and 8 to 9 sticking points are set. The spacing between the points is 12cm to 15cm. Each sticking point sticks 2 seedlings, and the pair of seedlings are stuck in pairs. . 8h to 10h after sticking. The distance between the suspension and the hanging frame is 30cm to 40cm. The spacing between the pile frame, the floating raft and the longline raft is between 23 and 28 meters, and the actual utilization area of ​​the culture is 13% to 18% of the water area. (4) Harvesting. After more than 6 months of cultivation, the seedlings can be harvested at the right time. In the most full winter and spring seasons of the soft body, that is, from the "Lidong" of the year to the "Qingming" of the following year, according to the reasonable arrangement of the market. (5) Transportation and storage. After harvest, put it in water with a salinity of 8‰30‰, and fresh meat is soaked in water with a salinity of 8‰30‰; fresh meat is packed in a box that is non-toxic and tasteless and easy to clean or keep warm. The box is stored in a clean warehouse to prevent the pollution of harmful substances. The temperature of the fresh meat is kept from 0 °C to 4 °C, and the temperature of the frozen product center should be lower than -18 °C. (6) Quality characteristics. 1. Sensory characteristics: Chengcun meat is milky white or grayish white, body fluid is clear, white or light gray, body is clean and full, no motley spots, sputum clams clean and bright without dirt, fleshy smooth and elastic, fresh蚝Inherent odor, delicious taste and fresh meat without residue. 2. Physical and chemical indicators: protein ≥ 10%, fat ≥ 1.5%, iodine content ≥ 130mg / kg, zinc ≥ 450mg / kg, iron ≥ 40mg / kg.

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The producers within the scope of the protection of the GI products of Chengcun can submit an application to the Yangxi County Quality and Technical Supervision Bureau for the use of the “Special Mark for Geographical Indication Products”, which is approved by the General Administration of Quality Supervision, Inspection and Quarantine.