Leiyang Sweet Potato Vermicelli belongs to the Leiyang Xiangnan Agricultural and Sideline Products Buying and Selling Association, and its craftsmanship has a history of more than 600 years. It was officially registered as a national geographical indication certification trademark in 2009 and is known as the first of the Four Treasures of Leiyang, the top ten star Hunan dishes in Hunan, and the ten must-have dishes in Leiyang. It can be said that it is famous in Sanxiang. Many outsiders visit Leiyang, and their favorite specialty is sweet potato vermicelli, besides tea seed oil. Leiyang sweet potato vermicelli is cheap, high-quality, and delicious. Regular consumption has the effects of prolonging life, curing diseases and fighting cancer, and improving health and beauty. The annual output of this product is about 20,000 tons, and it sells well in Changsha, Tianjin, Nanjing, Hainan, Beijing, Japan, the Philippines, South Korea and other places at home and abroad. Leiyang sweet potato noodles are nutritious, cheap and rich in starch, sugar, protein, vitamins and other nutrients. Long-term consumption can strengthen the body and prolong life. It is especially an excellent condiment in hot pot. It is purely handmade. Processed by traditional techniques without any chemical agents, it is truly a pure green natural food.

The conditions for use of the "Leiyang Sweet Potato Vermicelli" geographical indication certification mark stipulate that the production area of ??its products is Xiaoshui Town, Leiyang City, and the sweet potato raw materials used must come from Xiaoshui Town, Leiyang City. The quality must be natural, pure, green and healthy, and the processing water source must be underground spring water in Xiaoshui Town, Leiyang City. Product operators who meet the above conditions and follow the prescribed processing technology can apply for the use of the "Leiyang Sweet Potato Vermicelli" geographical indication certification trademark.