Add baking powder to flour, stir well, add water, make smooth dough, and ferment indoors.

2.

Add warm water to baking soda and mix.

3.

Pour baking soda on the fermented dough.

4.

Knead the dough evenly. 5,

Put the dough on the panel and knead it for 10 minutes, then stew it for 15 minutes. 6. Roll the dough into large pieces. 7. Brush a layer of oil and sprinkle with brown sugar. Roll it up slowly from one side and make a small dose. Twist it into the shape of a flower roll and put it on the drawer. Put the pot on the fire in advance, boil the water, put it in the drawer, steam for ten minutes, turn off the fire, and wait for five minutes to open it.