Guizhou Province is one of the main producing areas of Chinese herbal medicines in China. Among them, the eucommia produced in Zunyi City, because the quality is significantly higher than that of Eucommia in other places, it is named after the place of origin, and the cultivation of Zunyi Eucommia has a long history. In the history, Zunyi Eucommia was used as a distribution center in Sichuan and Chongqing. Eucommia, later named Zhengyi Eucommia.

Eucommia is one of the traditional Chinese herbal medicines in China. Eucommia ulmoides is a deciduous, broad-leaved tree of Eucommia. Eucommia ulmoides is resistant to drought and has a strong ability to adapt to growth. Common growth is between 450-1500 meters above sea level. The site conditions should be sunny, rich in rain, and the best in the thick, fertile and moist sandy soil and slightly acidic and neutral soil. The tree is long. There are two eucommia trees in Taiping Township, Green County, Zheng'an County. There are two branches of Eucommia ulmoides, and there are many branches and leaves. In 1984, the income from seed sales reached 700 yuan. Zunyi Eucommia, although there are wild, but due to the huge demand for Eucommia in the market, it has been widely cultivated by the people in recent years. At present, the area of ​​Eucommia ulmoides planted in Zunyi City is more than 30,000 mu, totaling more than 4 million plants, with an annual output of more than 4,000 kilograms of Eucommia ulmoides, which has become the main production area of ​​Eucommia in China. The eucommia bark of Yixian County is produced according to the export requirements of the foreign trade department. That is, each piece of skin is 33 cm long and 6.6 cm wide. It goes out of the epidermis, dried in water, dried and silky, without insects and holes, without reeling, no water stains, and the inside has been purple and red. For the export of medicinal materials. Fenggang, Renhuai, Xishui, Tonglu and other counties acquired 3-5 kilograms of Eucommia ulmoides. The annual output of the whole region is more than 70,000 kilograms, and the export volume is about 4,000 kilograms. The medicinal effect of Eucommia ulmoides Eucommia ulmoides is a valuable Chinese herbal medicine with functions of nourishing liver and kidney, strengthening bones and muscles, lowering blood pressure, and curing the fetus. It is listed as a traditional Chinese medicine in the Compendium of Materia Medica. For the treatment of kidney deficiency, back pain, weak feet, nocturnal emission, urination, itch, wet itching, threatened abortion and high blood pressure. External use of fresh skin can cure iron damage, sore swelling and so on. Eucommia should be suitable for middle-aged and elderly people with insufficient kidney gas, waist and knee pain, weak legs and feet, and urinary remaining; women with weak constitution, kidney gas is not solid, fetal leakage and habitual abortion; The sequelae of poliomyelitis, children walking too late, two lower limbs are weak; hypertensive patients. Bogey: Yin Huowang is cautious. How to use Eucommia Eucommia can be used alone or in combination with herbs for tonifying kidney and impotence. Or use Eucommia to stew pork loin soup, pork bone soup, are evenly strong muscles and bones, kidney and impotence. In addition, Eucommia can also be taken in tea and Jianshui.

Zunyi Eucommia quality technical requirements First, the source of Eucommia ulmoides Oliv. Second, the site conditions within the range of 800 to 1600 meters above sea level; soil thickness ≥ 50cm; soil texture is yellow brown soil, sandy loam soil; organic matter content ≥ 1.5%; soil pH: 5.5 to 7.5. Third, cultivation management 1. Seedling breeding: using seedling cultivation or asexual reproduction. 2. Planting: Spring planting (March) or autumn planting (November), planting density ≤1700 plants/ha (planting density: 3×2m plant spacing). 3. Fertilization: ≥30kg per farmer's fertilizer per year. 4. Tree shape: trunk shape. 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 can be started after 15 years of harvesting and harvesting. The harvesting time is from late April to early July. V. Processing 1. Process flow: peeling → layer overlap pressing → squeaking and sweating → drying → planing to rough skin → grading → packaging. 2. Main technical requirements: (1) squeaking and sweating: put the eucommia bark on the floor, put the board, compact and cover the straw; (2) dry: observe the endothelium changes, wait for the endothelium to become Purple brown, taken out to dry, sun to moisture content ≤ 13.0%. Sixth, the quality characteristics 1. Sensory characteristics: the skin is flat, the skin is less rough, grayish brown, thickness ≥ 0.5cm. The silver-white glue of the section is dense, and the endothelium is smooth and purple-brown. 2. Physical and chemical indicators: rosinol diglucoside ≥ 0.16%, leachate ≥ 13.0%. 3. Safety requirements: Product safety indicators must meet the relevant regulations of the state for similar products.

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Producers within the scope of Zunyi Duzhong's production area may submit an application to the Zunyi City Quality and Technical Supervision Bureau for the use of the “Special Mark for Geographical Indication Products”, which shall be reviewed by the Guizhou Provincial Bureau of Quality and Technical Supervision and reported to the General Administration of Quality Supervision, Inspection and Quarantine for approval. The testing organization of Zunyi Eucommia is selected by the Guizhou Provincial Bureau of Quality and Technical Supervision in the testing institutions that meet the qualification requirements.