Walnut is the best for invigorating brain and prolonging life. Guests who come to Huanglong County can always receive a box of thin-skinned walnuts, a specialty of the county. This kind of walnut is not only convenient to eat, but also popular in the market because of its low tannin content, high unsaturated fatty acid content, good taste and nutrients could be easily absorbed by the human body, according to authoritative identification. The one-kilogram walnut gift box processed and produced by Huanglong County dried fruit company is sold for more than RMB 100 Yuan per box in the market, with an average price of more than RMB 1 Yuan per walnut. Thin-skinned walnut has become the business card of Huanglong County, and calligraphers have given it the reputation of "Huanglong walnut is the best under heaven. " In order to build the leading industry of enriching the people and strengthening the county, in recent years, Huanglong County has aimed at the high-end market of walnuts, adhered to the variety, standardization and scale of industrial development path, more than 40 new varieties of dwarf early-feeding walnuts have been introduced for trial plantation successively. Huanglong County has undertaken and completed a number of key national and provincial walnut technology projects, and broken through walnut grafting and standardized production and so on many technical challenges. With the continuous development and growth of its own industry, it has also made Huanglong County a demonstration base for high-quality walnut production, a breeding base for improved walnut varieties seedlings and a training base for excellent walnut cultivation techniques in the whole province and even in the whole country. Hao Yanbin, National walnut chief expert and director of Beijing Forestry Fruit Tree Research Institute, and other 6 walnut experts, agreed that "Huanglong walnut is in the leading position in China in terms of standardized garden construction, large-scale development, improved variety planting and scientific management" through on-the-spot investigation and evaluation in Huanglong County. In September 2008, at the first China Walnut Congress held in Dayao County, Yunnan, two walnut varieties, “Xiangling” and “Shanhe No.5” mainly grown in Huanglong County, were awarded "Gold Prize" and "Silver Prize" respectively. The "Shenglong" brand walnut trademark registered by Huanglong County dried fruit company was recognized as "Shaanxi Famous Trademark" by Shaanxi Provincial Bureau of Industry and Commerce in the same year. The protection of geographical indication products of Huanglong walnut has also passed the expert evaluation organized by the General Administration of Quality Supervision, Inspection and Quarantine the People’s Republic of China.
"Huanglong County has a good ecological environment, no industrial pollution, and very few diseases and insect pests of walnuts, so there is no need to use any pesticides in the whole growing season, so Huanglong walnuts can be called pure natural and very green food." Some experts have commented on Huanglong walnuts, which shows that Huanglong walnut deserves the reputation of "Huanglong walnut is the best under heaven".
The protection scope of geographical indication products of Huanglong walnut is the administrative area under the jurisdiction of Huanglong County, Yan'an City.