The special subtropical river valley climate in Derong makes it rich in walnut, orange, peach, pear, apple, persimmon, pomegranate and other economic fruits, especially walnut yield is high, good quality, brain health and educational effect, can be eaten raw, fried food or candy, also can be squeezed oil. The tree has a long life span and can be harvested for many years once planted. It has become a new channel for farmers and herdsmen to increase their income.
　　Rongxian vigorously develop ecological agriculture, from planting high-quality walnut seedlings, improve the survival rate of seedlings, increase the technical guidance and other aspects of active efforts to guide the masses out of poverty and get rich, after several years of efforts, walnut industry has become an important industry to revitalize the county economy, achieve green mountains, rich people, strong ecology.
　　At present, the county walnut scale of 30,000 mu, has been built into a piece of walnut base 6,000 mu, the establishment of more than 500 small family orchards, equivalent to an area of more than 7,000 mu. In 2007, the fruit output of the county reached more than 600 tons, including more than 400 tons of walnut output, transferred to Chengdu, Kunming sales of more than 300 tons of walnut, annual output value of more than 3 million yuan, farmers and herdsmen per capita income from walnut industry 150 yuan.