(1) Soak the kidney flower in the pre-cooked pepper water and cool it for 5 minutes, then take it out and drain it, then rinse it with clear water and put it into the pot for stir-frying. Even if it is overcooked, it won't always spill blood.

(2) Or cut the pork tenderloin first, add some vinegar, then soak it in water for a while, and then cook it when it turns white. This method has no fishy smell, large waist and good taste.