From the producer:
One of the oldest ingredients in Chinese cooking, preserved black beans or douchi (豆豉) have been a part of Chinese cuisine for over 2000 years. Our preserved black beans are the most premium available outside of China and add a deep umami and complex salt to your dishes. Our preserved black beans come from the oldest factory in Pixian, where they have been fermenting their beans for over 100 years.
Ingredients: Soybeans, water, salt, flour, spices.