Where is the origin of Donggu soy sauce?

Donggu Soy Sauce Brand belongs to Heshan Donggu Seasoning Food Co., Ltd., formerly known as Diaozhen Soy Sauce Garden, which was founded in Daoguang 30 years of Qing Dynasty. It is the first batch of Chinese time-honored enterprises in the Ministry of Commerce. Donggu soy sauce is located in the third industrial zone of Maishui, Gulao Town, Heshan City, Guangdong Province. Donggu soy sauce has developed from soy sauce and noodles to brewing soy sauce, southern fermented bean curd, vinegar, sauce, seasoning, jam and pickles. Soy sauce is a traditional liquid condiment in China. When making, it is brewed with soybeans, defatted soybeans, black beans, wheat or bran, and added with water and salt. Soy sauce is evolved from soy sauce. As early as 3000 years ago, there was a record of making soy sauce in the Zhou Dynasty in China.