How to Choose Sweet Potato Starch and Sweet Potato Vermicelli with Confidence? A Visit to Qinhuangdao Tongyou Potato Industry Co., Ltd.

Entering the facility of Qinhuangdao Tongyou Sweet Potato Industry Co., Ltd. in Lulong County, one finds the company in the midst of its peak season for sweet potato harvesting and processing. Established in 1992—evolving from the former Lulong County Shuangli Vermicelli Factory—the company is exceptionally busy this year. Production lines in the workshops are running continuously, while starch and vermicelli—much of it destined for overseas markets—lie neatly stacked in the warehouses, awaiting shipment.

From Raw Sweet Potatoes to Starch and Vermicelli: A Comprehensive, Origin-Based Processing Model

Lulong County, home to Tongyou Sweet Potato Industry, is widely known as the "Sweet Potato Capital of China." The company’s operations leverage more than just local raw materials. According to public records, the facility spans 66,600 square meters, with a building area of 15,000 square meters and a fixed-asset investment of 35 million yuan. It has an annual processing capacity of 30,000 tons of fresh sweet potatoes, yielding 7,000 tons of sweet potato starch.

By situating itself in Lulong—a major sweet potato production hub—the company not only reduces costs associated with the transport and storage of raw materials but also gains the ability to strictly control the quality of fresh sweet potatoes before they enter the production process.

Balancing Traditional Craftsmanship with Modern Production

In the Lulong region, the production of vermicelli is deeply rooted in time-honored techniques. Tongyou Sweet Potato Industry’s product portfolio includes both high-volume staples—such as sweet potato vermicelli and edible sweet potato starch—and artisanal, hand-crafted varieties that evoke a "traditional flavor." Rather than abandoning these heritage methods, the company integrates them with modern production lines: automated equipment is used for starch purification and vermicelli shaping, ensuring higher yields and consistent texture, while traditional manual kneading techniques are preserved for the production of artisanal vermicelli, catering to customers with discerning tastes.

The company currently manages two brands, "Han Er Ge" (憨二哥) and "Shu Zhong Ru Yi" (薯终如1), encompassing four major product series. It is worth noting that the "Yongpingfu" brand of starch—registered by the company in South Korea—enjoys a strong reputation within the local food industry. Beyond its domestic reach—covering the Beijing-Tianjin-Hebei region, Northeast China, Shanxi, Shaanxi, Henan, and Fujian—the company’s products are also exported to South Korea, Vietnam, and Australia.

Exporting requires rigorous documentation and strict oversight

Entering the export market for food products entails a higher threshold than domestic sales. Tongyou Potato Industry holds a Food Production License, a registration certificate for export food production enterprises, a customs declaration registration certificate, and a record of foreign trade operator registration; it has also passed all necessary audits for export qualifications. The company’s ability to sustain its export business relies on this robust compliance framework. Furthermore, the company has implemented an intelligent management and control system covering the pre-processing and sorting of raw sweet potatoes, the production of wet vermicelli, and the recycling of wastewater from starch processing. This ensures a more standardized production process while simultaneously addressing environmental concerns.

Thanks to its long-standing commitment to quality and management, Tongyou Potato Industry has earned several accolades: it is recognized as a "Key Leading Enterprise in Agricultural Industrialization" and a "Demonstration Enterprise for Agricultural Product Processing" in Qinhuangdao, and holds an "AA-level" rating for financial integrity. It is also an authorized user of the "Lulong Vermicelli" geographical indication trademark (managed by the Lulong Sweet Potato Association) and was named a "National-level Science and Technology-based Small and Medium-sized Enterprise" this year.

Long-term success in the sweet potato business ultimately hinges on the product itself

Looking back over the past thirty years, Tongyou Potato Industry has evolved from a small vermicelli workshop into a professional potato-processing enterprise with export capabilities. The formula for this growth is straightforward: source high-quality raw materials, combine traditional craftsmanship with modern equipment, and maintain full regulatory compliance—when these elements come together, the products naturally gain market recognition. A motto displayed in the company’s facility sums it up perfectly: "Be honest in character, and craft your vermicelli with heart."

For products like sweet potato starch and vermicelli, consumers care most about texture, purity, and safety. For buyers and distributors seeking a reliable supply source, a site visit—observing the production process firsthand and verifying official credentials—is far more convincing than any promotional brochure. Tongyou Potato Industry also welcomes customers to visit its facilities—seeing is believing.