Preparation materials: 500 grams of flour, 3 grams of yeast, 330 grams of warm water, 1.5 grams of baking soda, flour for puff pastry, five-spice powder for puff pastry, vegetable oil for puff pastry, and salt for puff pastry.

1. Mix 3g of yeast and 1.5g of baking soda with warm water, pour in the flour and mix into a smooth dough, and let it rest in a warm place for 30-40 minutes.

2. Make the pastry during the noodle process: Put the flour, five-spice powder and salt into a bowl and mix well.

3. When the wok is hot, pour in the oil. When it starts to smoke, turn off the heat. Pour it into a bowl of flour while it is hot. Stir it evenly with chopsticks quickly. The pastry is ready.

4. Prepare the pastry.

5. After the dough has risen, knead it evenly and roll it out into large slices within 1 cm. Pour the pastry and spread it evenly.

6. Start rolling up from the narrow side, and stretch it as thin as possible until it is completely rolled up.

7. Cut into moderately sized pieces.

8. Tuck the mouths on both sides downward.

9. Place in an oven preheated to 170 degrees, turn on hot air circulation, 170 degrees Celsius for 10 minutes, then turn over and bake for another 8 minutes.