1. Pour the flour, baking soda, salt, eggs and cooking oil into a bowl and stir until flocculent.

2. Knead into dough and wake for one hour.

3. Brush the dough with oil, cut it in half, press it into a cake, and make three cuts in the middle.

4. Pour the oil in the pot, wait until it is 70% hot, add the oil cake, fry on low heat until both sides are golden, and serve out of the pot.