How to make steamed bread with mixed flour? Do you have to use hot water when mixing noodles?

it needs to be scalded with hot water before kneading into dough. The specific method is as follows:

First, put the bean flour and corn flour into the bread machine, add water and stir them into batter.

2. Add flour and yeast and stir into a dough with moderate hardness.

3. Ferment to twice the size and take out the exhaust.

4. Divide into small portions.

5. spread thin powder on the chopping board and knead it into a ball.

6. wake up for 1 minutes after everything is done.

7. Brush the steamer with oil.

8. put the steamed bread blanks. Steam on high fire for 2 minutes, turn off the heat and stew for 2 minutes.