Yun'an County is located on the southern edge of the Tropic of Cancer. It has a low latitude and is close to the ocean. It is a subtropical humid monsoon climate. The temperature difference between day and night in the hilly area is large, which effectively promotes the expansion of the fruit, which is beneficial to the degradation of chlorophyll in the peel and plays an important role in the accumulation of nutrients and carotenoids. It forms the characteristics of Nanshengsha sugar orange, which is premature, tender and juicy, with crispy flesh, sweet taste and bright fruit.

[Landmark Geography] Yun'an County is located on the southern edge of the Tropic of Cancer. It has a low latitude and is close to the ocean. It is a subtropical humid monsoon climate. There are many rainy days in spring and less sunshine; high temperature and rain in summer and autumn; less dry rain in winter, plenty of sunshine and cooler weather. The main feature is that the summer is long and the winter is short, the rainfall is abundant, and the high temperature period is consistent with the rainy period. The annual temperature is high, the annual average temperature is 21.5 °C, the summer is up to 7 months, the hottest July average temperature is 28.5 °C, and the coldest January average temperature is 13.1 °C. From November, the temperature in Yun'an County begins to drop significantly. The climate begins to cool down. The temperature difference between the hills and the hills in the mountains is large, which effectively promotes the expansion of the fruit, which is beneficial to the degradation of the chlorophyll of the peel and plays an important role in the accumulation of nutrients and carotenoids. It forms the characteristics of Nanshengsha sugar orange, which is premature, tender and juicy, with crispy flesh, sweet taste and bright fruit. [Culture background] In the early years of Wanli in the Ming Dynasty, the ancestors of Nansheng Town were chased and killed by thieves from Fujian Province. The ancestors had no choice but to lead the people to flee south, and they chose to go to Dazhushan area (now Yunan Nansheng Town, Yinan, material cave) Waiting for the place), the birds and flowers in this place are clear and the water is clear. Some people have suggested: Why not settle down here? Waiting for everyone: Very good! So I opened up the mountains and made land. I accidentally discovered that there were oranges on the hills and they were late, and they tasted them. It was very sweet and was preserved after being planted in the front room. When Chen Hao moved his family to Yunfu, he settled in Liudu Township (now Yun'an County). After he settled down, he planned it carefully, and built a house, and he was divided into a field. In the past few years, the construction of the county has begun to take shape, as the history book contains: “Mountains are picturesque, the songs of the walkers, and the homes are rather.” General Chen Hao learned about this fruit, called the person to pick it up, and tasted by his wife. Sweet and sweet, I don't know the name. Chen Xiaoxiao: You can take the famous sand candy. [Cultural Accumulation] In 2006, Nanshengsha Tangzhi and Gonggan were awarded as “Top Ten Quality Brands of Consumers' Most Trusted Fruit Industry” in Guangdong Province; Experimental Research and Application of Nanshengsha Sugar Orange Protected Fruits and Anti-split Fruits Yunfu Municipal People's Government Science and Technology Progress Award; in February 2006, Yunan County's Gonggan and Nanshengsha Tangerine and other three fruits passed the audit of China Green Food Development Center and obtained the green food A-level product certification, filling the county. The blank of agricultural products in the development of green food. On October 18, 2008, the Yunfu City Tourism Culture Festival Organizing Committee held the first tourism special product selection activity in Yunfu City. Nanshengsha Sugar Orange won the title of “Yunfu Top Ten Famous Tourism Local Products”; November 17, 2008, South Shengzhen Citrus Association was awarded as “Advanced Unit of Guangdong Science and Technology Farming Village” by Guangdong Science and Technology Association. On November 23, 2008, China Fruit Distribution Association held national fruit industry experience exchange and advanced typical publicity and commendation conference in Beijing. Nansheng Town of Yun'an County was awarded the honorary title of “China's first town of sand sugar orange” by China Fruit Distribution Association. [Brand Building] On December 24, 2008, Nanshengsha Tangerine was awarded the Gold Medal in the “2008 Guangdong Province Quality Citrus Appraisal Activity” hosted by the Guangdong Provincial Department of Agriculture. From November 28th to 29th, 2009, Yunan County was awarded the honorary title of “China's Quality Sand Sugar Orange Township” by the China Fruit and Vegetable Industry Brand Forum Organizing Committee. Nanshengsha Tangerine was awarded the China Fruit and Vegetable Industry Brand Forum Organizing Committee. “China Famous Orange Gold Award”. Through the establishment of industrial brands, farmers can operate in accordance with the requirements of pollution-free agricultural products during planting, effectively realize the scale and standardization of the production of sugar oranges, and promote the synergy of the sugar orange industry for reference by other production enterprises, so that the geographical indication products are Innovation in protection.

Nanshengsha sugar orange quality technical requirements (a) variety. Sand sugar orange. (2) Site conditions. The soil type is red soil, the soil is loose, the pH value is 5.5 to 6.5, the soil layer thickness is ≥500mm, and the organic matter content is ≥1.5%. (3) Cultivation management. 1. Seedling breeding: grafting and breeding with red orange, sour orange or clam shell as rootstock. 2. Planting: The planting time is from March to April, and the spring shoots are matured or planted before the summer shoots. Planted ≤1150 plants per hectare. 3. Fertilization: Mainly organic fertilizer, suitable with inorganic fertilizer; apply per decade of decomposed organic fertilizer ≥10 tons per hectare, apply 10-15 kg of pure nitrogen/1000 kg of fruit per year, and mix with appropriate phosphorus and potassium fertilizer. 4. Plastic trimming: Mainly trimmed in winter to ensure the ventilation and light transmission of the tree. (4) Fruit harvesting. The fruit harvesting time starts from the beginning of December, and is harvested in batches after more than 70% of the peels are turned; the harvesting method is one fruit and two cuts, and the irrigation is stopped 10 days before picking. (5) Quality characteristics. 1. Sensory characteristics: fruit shape flat and full; fruit orange red bright, uniform color, shiny; flesh flavor sweet, crisp and slag, soft and juicy, no nuclear rate of more than 95%. 2. Physical and chemical indicators: project index fruit transverse diameter (mm) 30-55 soluble solids (%) ≥ 12.0% total acid (%) ≤ 0.55 solid acid ratio ≥ 21.8 edible rate (%) ≥ 653. Safety requirements: products Safety indicators must meet the relevant regulations of the state for similar products.

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Producers within the scope of protection of Nanshengsha Tangzhi Geographical Indication Products may apply to the Quality and Technical Supervision Bureau of Yun'an County, Guangdong Province for the use of “Special Marks for Geographical Indication Products”, which are subject to review by the Guangdong Provincial Bureau of Quality and Technical Supervision. The General Administration announced the approval. The statutory testing agency of Nanshengsha Tangerine is designated by Guangdong Quality and Technical Supervision Bureau.