Zizhou County is located in the hinterland of the northern Shaanxi Plateau. It is mainly composed of loess soil. The soil layer is deep, the soil is loose, the drainage is good, and the water permeability is strong. It is especially suitable for the growth of scutellaria. Its cultivation of Astragalus has a long history and rich experience. Zizhou Huangqisu is famous for its thick and long strips, less wrinkles, firm and sturdy, powdery feet, sweet taste, bright color and high quality.

Zizhou soybean has been planted in the Loess Plateau of northern Shaanxi for thousands of years. Zizhou relies on local native species and the unique hilly and gully mountainous terrain of Zizhou. It is dry and rainless, with the same season of rain and heat, large temperature difference between day and night, long growing period and long illumination time. A variety of special natural growth factors make Zizhou yellow bean granules hypertrophy, appearance elliptical flat, resembling human kidney, soy isoflavone content is more than twice that of Northeast, Gansu, Xinjiang and other places, becoming a veritable "king of beans" ". Zizhou yellow bean color is light yellow, normal odor, long elliptical micro-flat shape, brown small spots in the umbilicus, 1000 grain weight ≥ 246g, rich in soy isoflavones, content ≥ 1000.0 μg / g.