How can steamed buns be fluffy and soft?

1. Pour 275ml of warm water into a bowl, add 5g of yeast powder and mix well, then pour in10g of sugar and continue to mix well.

2. Pour the yeast liquid into the flour and stir while adding water until the flour becomes flocculent without dry powder.

3. Knead the dough by hand, cover it with plastic wrap and wake up for 5 minutes before continuing to knead the dough.

4. Cover the kneaded dough with plastic wrap and put it in a warm place to wake it up. The interior is honeycomb.

5. Move the prepared dough to the chopping board and knead the dough thoroughly until the surface is smooth.