1, if convenient to buy fish, but I like to eat fish bones, I heard calcium, hehehe. Gather the fish, the whole fish in the Canadian supermarket is to go to the stomach and head, so only need to remove the scales and fins can be, cut into pieces, with cooking wine (can be replaced by beer), ginger, garlic, green onions, salt. Drown for about half an hour;

2, fry the fish, the fish pieces coated with starch (flour can also be used) in a frying pan until golden brown and fish out;

3, another pot (if 2 left with less oil you can also use 2's pot), put enough water and fish, because I ended up making all the fish spines are edible, so put in enough water;

4, in a separate pot put the garlic and onion stir-fry, add tomatoes, tomato paste, sugar, season and stir-fry;

5. Pour 4 into 3 and simmer for about 3 hours, the fish spikes will be very soft. During the period of attention to be ready to turn the fish pieces, do not stick to the pot. Stew the fish with low heat;