1. Preparation materials: yeast, warm water, flour, plastic wrap, utensils.

2. Generally, a bag of highly active dry yeast contains 5g. It is enough to put 4g into the container. Continue to add 250g of flour and mix evenly.

3. After mixing the flour and yeast evenly, slowly pour in warm water and start kneading the flour. If the flour is hard, knead for a while longer until the surface of the flour is smooth.

4. Place the kneaded dough in a container, cover the surface with a layer of plastic wrap to keep it warm, and place the container in a warm place to start fermenting until honeycomb holes appear in the dough, which proves the fermentation is successful.