1. Add yeast to the flour and mix well. Pour in the right amount of warm water. Stir with chopsticks.

2. synthesize the dough by hand, as shown in the figure, and knead the dough into a ball.

3. Wipe a small amount of water on the dough surface by hand to avoid dry skin and cover it with plastic film. Put the basin in the oven.

4. Adjust to fermentation for 50 minutes, as shown in the figure.

5. The dough begins to ferment. When the dough is fermented to twice the size of the original dough, the dough is fermented.