1. The quality of pig liver is not good enough: if the quality of pig liver is not good enough, the meat quality may become soft, smooth and moist, and the taste is poor.

2. Improper cooking method: if the cooking time is not enough or the temperature is not high enough, the bacteria inside the pig liver may not be completely killed, resulting in poor taste.

3. Too much water: If you add too much water in the cooking process, it may cause the pig liver to become soft and moist, which will affect the taste.

4. Improper preservation method: If the sauce pork liver is improperly preserved, it will cause moisture and oxidative deterioration, and it will also affect the taste.

It is suggested that you choose fresh, odorless, spotted and odorless pig liver when buying, and wash it carefully before cooking. If you are not sure how to cook pork liver with soy sauce, you can consult a local chef or check out relevant cooking tutorials to get a better taste.