250g flour, 0/50g water/kloc-0, 2g salt, 5g yeast, 2g baking soda 1.2g oil. Practice: 1. Dissolve yeast, salt and baking soda in warm water, add flour and knead into dough, and stir for 20 minutes; 2. Grease the dough and knead it evenly, then simmer for 20 minutes to make the dough soft and smooth for three times; 3. Put the kneaded dough in a warm place and ferment it to twice the size; 4. Roll the dough into pieces with a thickness of 0.5 cm and simmer for 15 minutes. 5. Cut into strips 2 fingers wide, with two overlapping strips, pressed together with chopsticks in the middle, and stretched at both ends; 6. Heat the oil pan and fry it in the oil pan until golden brown.