Wang Cang Eucommia, a famous specialty of Wangcang County, Guangyuan City, Sichuan Province, is the dry bark of Eucommia ulmoides plant, which is a valuable nourishing Chinese medicine. With many functions such as liver and kidney, strong bones and muscles, blood pressure lowering, and fetus, it has a good reputation in Southeast Asian countries and Hong Kong and Macao.

Wangcang County of Sichuan Province is the hometown of Eucommia in the country and is known as the “forest shade medicine town”. The genus Eucommia ulmoides is a deciduous tree of Eucommia ulmoides, also known as silk cotton. It can reach 15 meters to 20 meters. The bark is used as medicine. The Chinese patent medicine with Eucommia ulmoides as the main raw material has a good reputation in Southeast Asian countries and Hong Kong and Macao. The leaves can be made into health tea, exported to Japan, and can also extract gutta percha. The varieties are eucommia ulmoides and eucommia. Sichuan has a long history of development and utilization. It has been announced in 120 counties (cities) in the province, mainly in Guangyuan, Mianyang, Chengdu, Wanxian and Bazhong. In 1994, Sichuan Province planted an area of ​​about 76,000 hectares, and Eucommia produced about 1,800 tons. The dry bark of Eucommia ulmoides is commonly used in traditional Chinese medicine. Also known as Simian, Sizhong, silk cotton, and silk. It was first published in Shennong Bencao. Sexual temperature, sweet, slightly sympathetic, with liver and kidney, strong bones, fetus, lowering blood pressure and other effects. Mainly produced in Wangcang, Bazhong, Dachuan, Mianyang, Qingchuan, Pingwu, Wenjiang, Pengzhou, Dujiangyan and other places. Cultivated or wild in mountain forests, stripped of bark for nearly 10 years in spring and summer. The skin is thick, the block is large, the net is rough, the surface is silky, and the inner surface color is dark purple. The main medicinal ingredient is gutta percha. Due to the large daily consumption, a variety of mixed products appear everywhere. According to statistics, the cultivation of Eucommia in 22 towns and villages in Wangcang has been scaled up, the number of demonstration villages has grown from 10 to 24, and the number of demonstration households has increased from 2,000 to 7,000. The county has grown to 500,000 mu and more than 30 million. . Product Features Wangcang County is affiliated to Guangyuan City, Sichuan Province. It is located in the Micang Mountain Area on the northern edge of the Sichuan Basin. It has unique natural conditions and obvious regional characteristics. It has traditional processing techniques. Sensory characteristics: the skin is brownish gray, with shallow longitudinal cracks, dark purple endothelium, and no more than 10% broken pieces. Physical and chemical indicators: rosinol diglucoside ≥ 0.12%, chlorogenic acid ≥ 0.38%, total flavonoids ≥ 0.11%, water ≤ 11% o After the protection of the effect is protected, Wang Cang Duzhong commodity enterprises increase the annual output value of 2 million Yuan, the newly added tax of 200,000 yuan, 50 new jobs, the county's per capita income increased by 100 yuan. At present, the Wangcang Duzhong planting base has grown to 500,000 mu. The county's Duzhong dry skin storage capacity is 36,630 tons, the bark is 24,930 tons, the annual output is 86,670 tons, and the seed production is more than 10 tons. Wangcang Eucommia has been included in the “Twelfth Five-Year Plan of Wangcang County”. In the next few years, it will focus on the development and utilization of commercial Eucommia ulmoides. All levels and departments will increase support for Wangcang Eucommia, planning to 2015. In the year, the county will develop 600,000 mu of commercial Eucommia planting base. The output will reach 10,000 tons, and it will enter the ranks of the top ten counties in the national Eucommia production. Product Awards In 1989, the Science and Technology Committee of Sichuan Province listed the research project of “Civil Eucalyptus Stereo-Cultivated Rapid-Forming Forest, Skinning and Recycling Comprehensive Technology” developed by Wangcang County as a provincial key scientific research project. In 1996, Wangcang County was listed as a provincial science and technology commission. In 1998, under the direct concern of the Sichuan Provincial Quality Supervision Bureau, Wangcang County was listed as the second batch of high-yield, high-quality and high-efficiency agricultural standardization Eucommia demonstration area in the country. It was qualified in 2000 and was also nationally forestry in the same year. The bureau was named "National Famous Economy Forest - the Hometown of Eucommia".

Wang Cang Du Zhong quality technical requirements (a) site conditions. At an altitude of 500 to 1300 meters, the soil is loose and fertile, the soil pH is 5.0 to 7.0, and the soil thickness is 40 cm or more. (2) Cultivation management. 1. Seedling technology: Seeds are used for seedling breeding. 2. Seedling planting: spring planting and autumn planting, can be intercropped with forest medicine, the number of plants per hectare should not be greater than 1500 plants. 3. Fertilization: no less than 5000kg of organic fertilizer per hectare. 4. Tree management: use the central leadership to evacuate and layer. (3) Harvesting and processing. 1. Harvesting time: From May to June each year, the eucommia tree with strong growth potential of more than 15 years is selected, and the stripping regeneration technology is adopted, and the stripping cycle is 4 years. 2. Processing procedure: picking and peeling → laminating and stacking → flattening (sweating) → drying → peeling the outer skin → dividing → packaging. (4) Quality characteristics. 1. Sensory characteristics: the outer surface is taupe, with shallow longitudinal cracks, the inner surface is dark purple, smooth, and the cross section is white, with slight gas and slightly bitter taste. 2. Physical and chemical indicators: rosinol diglucoside ≥ 0.12%, chlorogenic acid ≥ 0.35%, total flavonoids ≥ 0.11%, water ≤ 11%.

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Producers within the protection scope of Wangcang Duzhong GI products may submit an application for the use of “Special Marks for Geographical Indication Products” to the Quality and Technical Supervision Bureau of Wangcang County, Sichuan Province, which is approved by the General Administration of Quality Supervision, Inspection and Quarantine.