1. Ingredients: 500 g flour (standard flour), 2 tsp salt (10 g), 1/2 tsp baking soda (3 g), 1/2 tsp baking powder (3 g), oil 1000 ml (actual consumption 30 ml).

2. Steps: Take a larger basin and add flour, salt, baking soda and baking powder.

3. Slowly add cold water, stir evenly with chopsticks, and then knead the dough with your hands to make the dough reach the softest state without sticking to the inner wall of the basin.

4. Finally, brush a layer of oil on the surface of the dough to prevent it from drying out. Let it rise at room temperature for 2-3 hours (you can make the dough overnight in winter).

5. Brush oil on a large flat plate, pull out a small ball of dough with your hands, place it on the plate and roll it out flat with your fingers. And make 3 slits in the center of the dough.

6. Heat the oil in the fryer over high heat until it smokes.

7. Place the dough flat into the oil pan, fry one side first, then flip and fry the other side. When both sides are browned, remove and drain away the oil.