When can soy sauce soak in oil?

15-30 days. According to the standard of soy sauce brewing, the raw materials for brewing are soybean and bran, which have low cost and short fermentation time, and can be oiled after a fermentation period of 15-30 days. However, the low-salt solid-state process uses less bran starch, less glucose yield and less alcohol, acid and ester. Soy sauce is a traditional liquid condiment in China.