1. First dilute the yeast with warm water, and mix the noodles with yogurt (you can decide how much yogurt you want)
2. The noodles should be a little softer, and use chopsticks to stir as much as possible (it is best to use plastic wrap to spread it faster)
3. The noodles are two to three times larger than the original
4. Sprinkle dried noodles and a little baking soda to make the steamed buns more empty
5. To add dry noodles, you need to make the noodles more vigorous. It is best to cut open and see that it looks like a pinhole (try not to add too much dry noodles, so that the steamed buns are not empty)
6. Roll out the dough, pour the oil and spread it evenly, sprinkle a little salt, roll it up, cut into pieces, and twist into a flower roll
7. Steam it on the pot for 15 minutes and it's OK
