The specific method of freezing tuna is as follows:

1. Prepare star anise, pepper, onion, ginger, garlic, cooking wine, vinegar, dark soy sauce, sugar, and coriander.

2. Cut tuna into pieces.

3. Put oil in the pot, heat it and add tuna pieces.

4. Fry one side for about 3 minutes, flip and fry for about 3 minutes, add star anise, pepper, onion, ginger and garlic.

5. Pour cooking wine, vinegar, dark soy sauce and a small amount of sugar into the bowl, mix well and pour into the pot.

6. Continue to simmer for 5 minutes, turn off the heat and add coriander.