Haizi Lake (also known as Changhu Lake) is the third largest freshwater river-water lake in Hubei Province. It is 30 kilometers from east to west, with an average width of 4 kilometers on the lake and a water area of ​​about 120 square kilometers. It is a combination of hills, plains, lakes, rivers and tidal flats. It has a variety of landforms, excellent ecology and beautiful environment. It is a rare treasure land with comprehensive functions such as flood storage, irrigation, aquaculture, shipping, tourism and wetland ecology. There are Changhu Lake, Haizi Lake and Miaohu Lake in Ji'nan Town. The water resources are very rich, and the water industry has always been an important source of economic income for local villagers.

Haizi Lake Qingyu (Changhu Qingyu) quality technical requirements First, the source of herring (Mylopharyngodon piceus (Richardson)). Second, the water quality within the aquaculture environment is fresh, no pollution, the water quality meets the relevant national water quality standards, water depth ≥ 2.5m, water body transparency ≥ 30cm, pH value 7.0 to 8.5, dissolved oxygen ≥ 5mg / L. Third, aquaculture management Source of seed: Select national and provincial black carp breeding farms from the place of origin, follow-up and purchase to ensure the authentic source of the seed. 2. 3. Seed stocking time: From January to March each year, the stocking density is 200 to 260 fish per 179 m2 (mu) of water. 4. Feeding management: Feeding mollusk feed such as snails and scorpions and special feed for herring. 5. Environmental and safety requirements: The prevention and control of the breeding environment and epidemic diseases must comply with relevant state regulations and must not pollute the environment. 4. The catching and catching specifications are ≥4kg per tail. V. Quality characteristics 1. Sensory features: the meat is tender and delicious, and the fish is round and smooth. The upper part of the body and the upper part of the body are blue-black, the abdomen is grayish white, and the fins are grayish black. 2. Safety and other quality technical requirements: Product safety and other quality technical requirements must comply with relevant national regulations.

Apply to：
Producers within the production area of ​​Haizi Lake Qingyu (Changhu Qingyu) may apply to the Jingzhou District Quality and Technical Supervision Bureau of Jingzhou City, Hubei Province for the use of the “Special Mark for Geographical Indication Products”, which is reviewed by the Hubei Provincial Bureau of Quality and Technical Supervision. Announced after approval by the General Administration of Inspection and Quarantine. The detection mechanism of Haizi Lake Qingyu (Changhu Qingyu) is selected by the Hubei Provincial Bureau of Quality and Technical Supervision in the inspection institutions that meet the qualification requirements.