Rongcheng Kelp is a geographical indication certification trademark.

Rongcheng City, Shandong Province has officially obtained the registration of the "Rongcheng Kelp" geographical indication trademark (ie, protection of origin). Rongcheng City, located at the easternmost tip of the Shandong Peninsula, is known as the "Hometown of Kelp in China".

The kelp breeding area within the jurisdiction covers an area of ??100,000 acres, with an annual output of more than 1 million tons of fresh kelp. The breeding area and output rank first in the country, and the average annual kelp production accounts for 80% of the province’s total output, and is the largest in the country. More than 40% of the total is a product with significant geographical advantages. Rongcheng is also the main production area and main export processing area of ??peanuts, with an annual output of more than 80,000 tons and an export volume of more than 30,000 tons.

Kelp is known as the "Cordyceps sinensis" of the sea. Rongcheng kelp is famous for its large algal body, thick leaves and high nutritional content. Its annual output accounts for more than 50% of the country's total, and it is the iconic product of cultivated kelp in my country. . In 2007, "Rongcheng Kelp" was approved and registered as a geographical indication certification trademark by the State Administration for Industry and Commerce; in 2008, Rongcheng became a "National Demonstration County for Kelp Standardization".

The artificial cultivation of kelp in Rongcheng began in the 1960s, with the eastern sea area of ??Rongcheng as the main production area, followed by the northern sea area. The period from artificial breeding to mature harvesting is about 8 months. The kelp harvested in the early stage is mainly salted kelp and ready-to-eat food, while the kelp harvested in the later stage is mainly light-dried. Now a complete kelp industry chain has been formed. "Algae-eating Treasure" ", "Haizhibao" and other products have become well-known brands. The city has more than 180 kelp processing lines, with more than 300 varieties of products in three categories: salted, dried and ready-to-eat, with an annual processing capacity of more than 200,000 tons.