Magnolia is the most famous of Enshi Shuanghe Bridge. It is thick, thin, oily, with strong aroma, brown cross section and dark purple inner surface. It is called 'Laoshan purple oil magnolia' and is known as top grade." Because its texture is characterized by "purple and oily", the title is called purple oil magnolia.

Purple oil magnolia is an authentic medicine of Enshi. Tao Hongjing: "Huangpu was built in Ping and Yidu (Western Hubei, when Enshi belonged to Jianping County). The skin was thick, the meat was purple, and the shell was thin and white was not good." "Drug Production Distinguished" Chen Renshan said: "The purple oil is thick and thick, and it is thick and oily, with a purple-purple color and a bitter taste." "Practical Medicine" (1958) Xiong Mengxu: Houpu is mainly produced in Hubei, Sichuan and other places, with the best quality produced in western Hubei. According to "Hubei Forestry Journal" and "Enshi Prefecture Forestry", "Huangpu, the most famous of the Enshi Shuanghe Bridge, is thick, fine, oily, rich in aroma, brown in section, dark purple on the inner surface. For the 'Laoshan purple oil magnolia', known as the top grade." Because its texture is characterized by "purple and oily", the title is called purple oil magnolia. It can be seen that the quality of Enshi purple oil magnolia is deeply affirmed and praised by medical scientists and marginal scientists. Enshi purple oil magnolia cultivation initial Shuanghe Bridge, Xintang Township, Enshi City. According to legend, more than 500 years ago (around 1500 AD), when Liao, Zhang, Li, Wang, Zhao and other surnames moved from Hunan to Enshi Shuanghe Metasequoia Dam, this area is a deserted metasequoia forest, hence the name Metasequoia dam"). After felling, peeling, processed and sold, in preparation for wedding supplies. So far from generation to generation, there are still more than 10 hundred-year-old Houpu trees of more than one hundred years old, and the two largest Houpu trees are called "Huangpu King" by local people. At present, in the 1841 AD (Qingdaoguang 21 years) discovered by Enshi, there are engraved stone tablets of mulberry, paulownia, lacquer, Yukuo, and Wusong promulgated by the prefecture. It can be seen that the local government in the Qing Dynasty has already Guided planting of Magnolia. In the 1930s, the dense Houpu forest has replaced the metasequoia forest. Since then, the popularity of the Houpu Bridge has gradually expanded. At one time, drug dealers in Wuhan, Hunan, Sichuan, Jiangxi, Guangzhou, and Anhui provinces have come to the area. Acquired the magnolia and concentrated on the processing of the meteor dam. Then the products will be transported to Chengdu, Wuhan, Changsha, Nanchang and other places in Sichuan, and will be exported to Hong Kong, Macao, Japan and Southeast Asian countries, making Enshi Purple Oil Magnolia famous both at home and abroad. In the 1970s, the state established a four-million-mu magnolia base in Hubei Enshi (Shuanghe), Sichuan Dujiangyan, Guangxi resources, and Zhejiang Jingning in the main production area of ​​Houpu. Enshi Shuanghe provided a large amount of magnolia for other producing areas. Seeds, seedlings. The cultivation and processing of Magnolia has always been one of the main economic sources of local farmers. After the founding of New China, Enshi purple oil magnolia plantation was highly valued by the local government and relevant departments. In the 1950s and 1960s, the state-run Taishan Temple medicinal material field, the Datopu medicinal material field and the Shuanghe Changlinggang Commune medicinal material field were established. Formed a professional medicinal field based on the cultivation of purple oil magnolia. According to historical data, the current area of ​​purple oil planted in the county was 166.6 hectares. In the 1970s, under the call of “developing the economy and guaranteeing supply”, Enshi Purple Oil Magnolia Plantation developed rapidly. In 1972, Hubei Pharmaceuticals Co., Ltd. listed Enshi City as a magnolia production base, and established a 10,000-mu thick plain forest in the Shuanghe Changlinggang medicinal material field. Under the influence of the county, more than 20 specialized medicinal materials fields have been established in the county. Only Shuanghe has more than 10 battalions and squad medicinal plants with purple oil and magnolia. According to historical data, Enshi City Pharmaceuticals Company acquired a total of 230,000 dans from 1952 to 1985. In the mid-1980s, due to the soaring market in the Magnolia market, the local farmers unreasonably felled, resulting in a sharp decline in the area of ​​Magnolia. By the early 1990s, the remaining area of ​​the Enshi adult Houpulin was less than 10,000 mu. The magnolia harvesting period is more than 10 years, causing the embarrassing situation of the purple oil magnolia in the next 10 years. Entering the 21st century, with the implementation of the modernization of Chinese medicine, the Magnolia industry has entered a new path. In 2001, Hopu was included in the national and Hubei science and technology research projects. In 2006, Magnolia was included in the “Ten”. The “Five-Year” major project “Establishment of the production and quality standard system of authentic medicinal materials in Hubei Province” In 2010, Houpu was included in the “Twelfth Five-Year” Hubei Province six key authentic medicinal materials. Through the research and promotion of the Institute of Chinese Medicinal Materials of Hubei Academy of Agricultural Sciences in the past ten years, 5,000 mu of the Magnolia standardized planting base centered on Changlinggang, Shuanghe Town, Xintang Township, Enshi has been built, and the corresponding Enshi purple oil thick has been built. Park Liang breeding base. Among them, 500 mu of maternal garden and 250 mu of nursery base were established, and 500 mu of nursery bases were guided by the company and farmers. In the year, it provides 10,000 kilograms of high-quality magnolia seeds and 4 million seedlings, which creates conditions for controlling the quality of seeds and seedlings from the source and improving the standardized planting level of magnolia. At the same time, the surrounding area of ​​Magnolia is nearly 300,000 mu. Although the output in recent years is not large, the planting scale is second to none in China. In recent years, the production of Magnolia is about 1,000 tons, still accounting for 30% of the national magnolia (including Wenpu) production.

Enshi purple oil magnolia quality technical requirements (a) species name. Magnolia officinalis Rehd.et Wils. (2) Cultivation techniques. 1. Site conditions: Choose soils with an altitude of 600 to 1700 m, yellow brown soil or brown soil, pH 5.5 to 6.5, and cultivated in a non-polluting environment. 2. Seed collection and storage: In September each year, mature seeds of Magnolia tree collected for more than 10 years in the area of ​​origin are processed and stored. 3. Selection: Before sowing, the seeds are full and the color is bright. The 1000-grain weight is not less than 140g. 4. Sowing and seedling: not less than 24kg per acre; seedling height not less than 30cm, ground diameter ≥0.8cm. 5. Transplanting: Adopting the technology of hole-planting points. The transplanting hole is 20 to 30 cm deep and 30 to 50 cm wide. 100 plants per acre (plant spacing is about 2.6 × 2.6m). The Tanabe area is cultivated according to local conditions. (3) Harvesting and processing. 1. Harvest: Before and after the summer solstice, select trees that have been aged for more than 10 years. Harvesting method: cut the bark horizontally from the surface of the tree growing at intervals of about 40cm, then cut the bark along the trunk, peel off the bark with a peeling knife, and use small wooden branches to make the skin Separate and then strip the bark. 2. Processing technology: Process flow: binning - water - sweating - drying - steaming - reel - cable - cut - dry - packaging - storage. Process requirements: Put the trunk skin in boiling water for 5 to 8 minutes, remove the cleaned place, cover the grass "sweating", when the inner surface is purple brown or brown, roll into a double cylinder, using the cross stack method Dry naturally. The root bark and branches are naturally dried. (4) Quality characteristics. 1. Sensory: dry skin: in a single roll or double roll, the outer surface is yellowish brown, with fine vertical lines. The inner surface is purple-brown or deep purple-brown, and the oil marks are marked. The cross section is fibrous and oily. Root bark: Single-rolled or irregular piece, the surface is yellowish or taupe, the inner surface is brown, and the cross section is fibrous. Branches: long or rolled, with a brown outer surface, a purple-brown inner surface, and a fibrous cross section. Smell: fragrant, spicy, slightly bitter. 2. Physical and chemical indicators: total honokiol, and magnolol (C18H18O2), dry skin, root bar ≥ 4.0%, bark ≥ 2.5%, moisture ≤ 14% (both in dry matter).

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Producers within the scope of protection of Enshi Purple Oil Magnolia Geographical Indication Products may submit an application to the Enshi Quality and Technical Supervision Bureau for the use of the “Special Mark for Geographical Indication Products”, which shall be approved by the General Administration of Quality Supervision, Inspection and Quarantine.