How much water does it take to make a catty of flour for steamed bread?

Put 300g of water, and the specific method of steamed bread is as follows:

Materials that need to be prepared in advance include: flour 1 kg, 300g of water, 5g of yeast and 80g of sugar.

1, the first step is to put flour, yeast, sugar and water together and stir them evenly.

2, synthetic dough, put aside and wake up for 2 hours.

3. After 2 hours, the dough is degassed, as shown in the figure below.

4. Divide the dough into small portions.

5. Knead the dough into a round ball and put it aside to wake up for 20 minutes.

6. Steaming under cold water and steaming for 25 minutes.

7. You can take it out when the time is up, so that the steamed bread is ready.