Maybe you didn't get rid of the fishy smell enough. After cutting the pork, add cooking wine, raw flour and soy sauce for 5 minutes, and it will be fine. Adding proper amount of vinegar can remove calcium from fishy smell, or adding a few pieces of fresh orange peel can not only remove fishy smell to make it delicious, but also reduce greasy feeling. When the temperature in the pot reaches the highest, adding cooking wine can easily evaporate the wine and remove the fishy smell in food.