How to make old steamed bread?

The specific steps of making steamed bread with old flour are as follows:

1. Pour the yeast and sugar into warm water and stir evenly with chopsticks.

2. Pour the yeast water into the flour and stir it into a flocculent shape with chopsticks.

3. Knead into a smooth dough.

4. Knead the dough into long strips.

5. Divide into several equal parts.

6. Knead each portion of dough into a circle, about 50 times. Cover the dough with plastic wrap to prevent it from drying.

7. Put it on the steaming rack of the functional pot and let the steamed bread embryo ferment in a warm place for about 25 minutes.

8. Fermentation is twice as big. Put cold water on the pot. After the water is boiled, turn to medium heat and continue steaming for about 12 minutes.

9, steamed bread out of the pot.