You can add baking soda to make steamed buns. The steps for making steamed buns are as follows:

1. Add salt and sugar to the flour and stir evenly.

2. Dissolve the yeast in warm water, then let it sit for a few minutes until the yeast is activated.

3. Knead the dough into a snowflake shape first, and then knead it into a smooth dough. Be sure to knead until the surface is smooth, the basin is smooth, and the hands are smooth. After the dough is kneaded, cover it with a lid or plastic wrap and let it ferment.

4. Let the dough ferment in a warm place until it is 2.5 times its original size.

5. Deflate the dough and cut it into small pieces one by one.

6. Use the palm of your hand and the tiger's mouth to push the dough on the chopping board to make the dough round, and then put it in the steamer to wait for the second fermentation.

7. After it has doubled in size, add cold water to the pot. After the water boils, steam for 10 minutes and turn off the heat. Steam for 2 minutes and then it is ready.