Chinese
Mix the flour, baking powder, baking soda and salt, then add the egg, water and 1 tbsp of oil and stir into a soft, sticky dough.
Knead for 2-3 minutes, cover and rest for 20 minutes; knead briefly again and repeat twice more.
Shape the dough into a flat rectangle, oil it, wrap it and refrigerate for 8 hours or overnight.
Let the dough come to room temperature, stretch and press it into a long strip about 10 cm wide and 1 cm thick, and cut it crosswise into 16 equal strips.
Stack two strips on top of each other and press them together lengthwise with a chopstick.
Heat the oil to 200C, stretch each pair to about 25 cm and fry for 1-2 minutes, turning constantly, until puffed and golden brown.
Drain on a rack and serve warm, traditionally with soy milk or rice porridge.