"Donggu brand" is the registered trademark of Donggu Seasoning Food Co., Ltd., Heshan City, Guangdong Province. It is a private food enterprise that started operating in the 30th year of Daoguang reign of the Qing Dynasty (AD 1850) and has a history of more than 150 years. The company is now located in Maishui Industrial Development Zone, Gulao Town, Heshan City. It was formerly known as Tiaozhen Sauce Garden and was originally located in Gulao Market, Gulao Town, Heshan County. The company now has nearly 60 products in seven series, including brewed soy sauce, Gurao noodles with black bean paste, fermented bean curd, sauces, vinegar, oyster sauce, and seasonings. Donggu series products are produced using advanced technology and advanced equipment. Each production process undergoes strict quality control. Over the years, it has undergone random inspections by national quality supervision and local quality inspection and health inspection departments. All indicators are in line with national quality standards.