Anren blueberry fruit is dark blue and fruit powder is thick. The fruit is large and full, the flesh is fine, the gum is strong, and the sweet and sour taste is palatable. 2. Physical and chemical indicators: soluble solid content (type) (Northern high-bush blueberry: 12.3- 14.5%; South high-bush blueberry: 10.5 - 13.5%; rabbit eye blueberry: 10.3 - 13.0%). Acid content (calculated by citric acid, subtype) (Northern high-bush blueberry: 0.650-0.710%; Nangao bush blueberry: 0.610-0.680%; rabbit eye blueberry: 0.590-0.660%;). Anthocyanins (calculated as cornflowers, peony, mg/Kg, subtypes) (Northern high-bush blueberry: 1200-1400; South high-bush blueberry: 1100-1300; rabbit-eye blueberry 1000--1200).

Anren Blueberry Quality Technical Requirements 1. Variety of North High Bush Blueberry, South High Bush Blueberry, Rabbit Eye Blueberry. Second, the site conditions range from 450m to 650m above sea level, the soil texture is sandy loam soil, the soil pH value is 4.3 to 5.5, the soil organic matter content is ≥5%, and the groundwater level is lower than 60cm. Third, cultivation management Seedling: tissue culture and cutting propagation. 2. 3. Planting density: ≤ 10,000 plants per hectare. 4. Fertilization: The annual application of decomposed organic fertilizer ≥ 450m3 / hectare. 5. Environmental and safety requirements: The use of pesticides, fertilizers, etc. must comply with relevant national regulations and must not pollute the environment. 4. Harvesting from mid-April to early August, the fruit surface is completely blue and harvested in batches. V. Quality characteristics 1. Sensory characteristics: the fruit is dark blue and the fruit powder is thick. The fruit is large and full, the flesh is fine, the gum is strong, and the sweet and sour taste is palatable. 2. ~0.6800.590～0.660 anthocyanin (calculated by cornflower, peony), mg/kg1200～14001100～13001000～12003. 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 Anren Blueberry's production area may submit an application to the Quality and Technical Supervision Bureau of Dayi County of Sichuan Province for the use of the “Special Mark for Geographical Indication Products”, which shall be reviewed by the Sichuan Provincial Bureau of Quality and Technical Supervision and reported to the General Administration of Quality Supervision, Inspection and Quarantine for approval. The testing mechanism of Anren Blueberry is selected by the Sichuan Provincial Bureau of Quality and Technical Supervision in the testing institutions that meet the qualification requirements.