How to fry the fish pieces crisply?

The method of frying fish crisp is as follows:

Ingredients: ingredients: herring 250g; accessories: egg white100g; Seasoning: wheat flour 5g, baking powder 50g, salt 2g, white wine 5g, scallion 10g, monosodium glutamate 2g, ginger 3g, salt and pepper 4g, lard 50g and tomato sauce 20g.

Practice steps:

1. Wash and drain herring, cut into long strips, add wine, salt, onion, ginger slices and monosodium glutamate, stir well and marinate slightly.

2. Mix the protein with chopsticks, add flour, baking powder and a little water to make a protein paste.

3. Put the fish sticks into the egg lake paste and mix well.

4. Put the cooked lard into the pot and heat it to 50%. Put the fillets wrapped in paste into the pot respectively, and take out and drain the oil when the egg paste is just cooked.

5. When the oil is 70% hot, put the fish fillets into the pot, and when they are light yellow and soft-shelled, take them out, drain them and put them on the plate.

6. Put pepper, salt and ketchup on the side of the plate and dip it when eating.