- This product is based on the ancient method inherited from Taiwan's Xiluo Black Bean Bottom Shade Sauce Master, Mr. Ayan, strict selection of black beans, soaking and steaming, under the koji fungus to make koji, washing and mixing with salt, plus coarse salt to seal the jar, the black beans in the urn exposure to the sun, so that the koji fungus in the jar due to the time and temperature of the high and low ups and downs, and slowly the black beans contained in the nutrients and essence stimulate the development of the future a The black bean juice is rich in nutrients. Black beans are rich in nutrients and are fermented and brewed naturally, making the nutrients more easily absorbed.