Preparation materials: flour: 200 grams, yeast powder: 2 grams, warm water: appropriate amount, salt: appropriate amount.

1. Pour the yeast powder into a clean container, then pour in an appropriate amount of warm water to melt.

2. Add appropriate amount of salt to the flour, then pour in yeast water, then add appropriate amount of water to knead into a smooth dough.

3. After the dough is kneaded, place it in a warm place to ferment until doubled in size, then take it out and knead it evenly to deflate it.

4. Knead the dough into a long strip, then divide it into small equal portions and round it into a round shape to make a steamed bun dough.

5. Pour an appropriate amount of cold water into the steamer, put the steamed bun base into the steamer, bring to a boil over high heat, and then steam for 15 minutes.

6. After 15 minutes, turn off the heat and simmer for 3 minutes before serving.