Leech is an important raw material for traditional Chinese medicine for treating cardiovascular diseases such as hyperlipemia and cerebral thrombosis. Due to human activities, the resources of wild otters in Shidian have plummeted, and the contradiction between supply and demand of leeches has become increasingly prominent. Shidian Shuiyu has once become a very good raw material for traditional Chinese medicine in Yunnan and even China.

Technical requirements for quality of Shidian leeches I. Variety Philippine burdock II. Growth environment The environment is quiet, the water source is sufficient, the irrigation and drainage is convenient, the water quality is fresh and pollution-free, neutral or weakly acidic, in line with the national fishery water quality standards. The soil quality should meet the requirements of GB15618 secondary soil, the soil moisture is about 60%, the humus content is low, and the gas permeability is good. It is preferable to use a light intensity of 500 lx. The temperature of the aquaculture water in summer is not higher than 32 °C, the temperature of the aquaculture water in winter is not lower than 10 °C, and the annual average temperature is above 20 °C. The breeding area should choose an altitude of 1400 meters to 1500 meters. Third, aquaculture management Breeding mode: pond cage culture, ecological farming. 2. 3. Feed feeding: Feeding special feed and plasma solution of Shidian leeches. 4. Environmental and safety requirements: Feeding environment, prevention and control of epidemic diseases must implement relevant national regulations and must not pollute the environment. Fourth, harvesting, processing 1. Harvest: When the cultured individual weighs more than 10g, it can be harvested. 2. When the temperature is between 25 °C and 30 °C, dry for 3 days to 5 days (in case of rainy days, put the dried water in a ventilated room and keep the ambient temperature at 10 °C - 15 °C) until the moisture content is less than or equal to 15%. V. Quality characteristics 1. Sensory characteristics: The project requires traits dry long oval, long strip, willow-like, flat or twisted, 4 to 13 cm long, 0.3 to 1.2 cm wide, dark brown or dark brown on the back, with a few protrusions; black belly, Smoother. The front section is slightly pointed, the back end is obtuse, and each end has a suction cup. The front suction cup is not noticeable and the rear suction cup is large. Crisp, easy to break, cross-section gelatinous, black. The air is slightly sloppy and tastes salty. 2. Product safety and other quality technical requirements: Product safety and other quality technical requirements shall comply with relevant national standards.

Apply to：
Producers within the scope of production of Shidian Shuiyu may apply to the Shidian County Market Supervision Administration for the use of the “Special Mark for Geographical Indication Products”, which shall be reviewed by the Yunnan Provincial Bureau of Quality and Technical Supervision and reported to the General Administration of Quality Supervision, Inspection and Quarantine for approval. The inspection agency of Shidian Water Margin is selected by the Quality and Technical Supervision Bureau of South Province in the inspection institutions that meet the qualification requirements.