Changning tea oil is a specialty of Changning City, Hengyang City, Hunan Province. Changning Camellia has a long history of planting, unique geographical environment and human factors. It is rich in nutrients, bright yellow color, pure quality, fragrant smell, and both medicine and food. It is well-known at home and abroad.

Camellia, (Latin name Camellia oleifera Abel.) Alias: tea tree, tea tree, white flower tea; Camellia is a tea family, evergreen small trees. Because the seeds can be extracted from oil (tea oil), hence the name. Tea oil color is fragrant, nutritious and resistant to storage. It is a high-quality edible oil. It can also be used as a lubricating oil and anti-rust oil for industrial use. Tea cakes are both pesticides and fertilizers, which can improve the water storage capacity of farmland and prevent pests in rice fields. The peel is the raw material for the extraction of tannin. Camellia is warm, afraid of cold, requiring an average annual temperature of 16 to 18 ° C, and an average temperature of 12 to 13 ° C during flowering. Sudden low temperature or night frost can cause falling flowers and falling fruits. It is required to have more sunshine, otherwise it will only grow branches and leaves, with less results and low oil content. It is required to have sufficient water, and the annual precipitation is generally above 1000 mm, but the continuous rainfall during flowering affects pollination. It is required to be planted in a place where the slope is gentle and the erosion is weak. The soil requirements are not strict, and it is generally suitable for the deep acid soil of the soil layer, and is not suitable for places with many stones and hard soil. Changning City has a long history of planting Camellia oleifera. It has always been famous for producing high-quality original tea oil. The culture of Camellia oleifera and tea oil has a long history and is known as the “natural oil depot”. After the liberation, the Changning oil-tea industry was valued by the government, and the cultivation of camellia was rapidly developed. Camellia forest became the most important economic forest in the city. The development of oil tea led to the development of oil mills. According to the survey, in the early 1990s, there were manual houses in the city. 2,113, all over the townships and villages of the city, all villages can hear the sound of "squeezing, smashing" oil. Changning City has become the oil tea production base in Hunan Province. The oil tea industry has developed rapidly. Every town in the city has planted oil tea. The area of ​​oil tea has exceeded 788,000 mu, becoming the leading industry of the municipal economy and a veritable “natural oil depot”. In recent years, Changning City has vigorously developed the east wind of the oil tea industry by the state, attaches great importance to the development of the oil tea industry, aims to build the first city of China's camellia, adheres to the government guidance, market leading, social participation, new creation and low reform, and introduces Hunan. Jiangshan Ecology, Xishi Ecology, Mingtian Science and Technology, Hunan Dasanxiang and other more than 10 large-scale oil tea development enterprises, the pace of base construction has been significantly accelerated, the introduction of COFCO Group in our city to set up oil tea research and development center and deep processing enterprises, oil tea industry construction achieved remarkable results. Up to now, the city's new high-yield oil tea forest 150,000 mu, low-reformed eucalyptus tea forest more than 250,000 mu, oil tea production of 5,000 tons, annual output value of more than 500 million yuan, has basically formed seedlings, bases, processing, technology, tourism The oil tea industry chain that integrates with culture.

Technical requirements for quality of Changning tea oil 1. Variety of ordinary oil tea, Xianglin series of oil tea. Second, the site conditions of the production area within the altitude of ≤ 500m, the soil type is red loam and the fourth soil red loam, slope ≤ 25 °, pH value of 5.0 to 6.5, soil thickness ≥ 40cm, soil organic matter content ≥ 2%. Third, cultivation management Seedling: grafting method of seedlings and seedlings and seeding breeding. 2. 3. Fertilization: Based on organic fertilizer, the amount of organic fertilizer applied per plant per year is ≥15kg. 4. Environmental and safety requirements: The use of pesticides, fertilizers, etc. must comply with relevant national regulations and must not pollute the environment. 4. Harvested in October, the shells are micro-cracked and the seeds are fully mature. Fifth, processing 1. Process: tea fruit - stacking - drying - go to the shell - crush - steaming - pressing - coarse filtration - static precipitation - filtration. 2. (2) Pressing: oil pressing temperature ≤ 80 ° C, oil yield ≤ 80%, residual oil in the cake ≥ 8%. (3) Static precipitation: The coarsely filtered tea oil is placed in a pottery cylinder and naturally settled at room temperature, and the standing sedimentation time is ≥ 15 days. Sixth, quality characteristics 1. Sensory features: oily yellow transparent, with the inherent smell and taste of tea seed oil, rich flavor, smooth and smooth taste. 2. 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 Changning tea oil production can submit an application to the Quality and Technical Supervision Bureau of Changning City, Hunan Province for the use of “Special Marks for Geographical Indication Products”, which will be reviewed by the Hunan Provincial Bureau of Quality and Technical Supervision and announced to the General Administration of Quality Supervision, Inspection and Quarantine for approval. The testing mechanism of Changning tea oil is selected by the Hunan Provincial Bureau of Quality and Technical Supervision in the testing institutions that meet the qualification requirements.