Natural Fermentation

Prepare a basin, put a kilogram of flour into it, and then add warm water to it, the temperature of which is about 40 degrees, and add warm water to the flour while using chopsticks to stir the flour, until the flour appeared to be cotton-wooly, then don't add water to it.

Then use your hands to knead the flour to form a dough, after kneading the dough, you need to prepare a clean towel to cover it tightly, and then put it into the temperature of about 30 degrees Celsius, the dough for fermentation, fermentation time is best in more than 10 hours.

When the dough swells significantly and there are a lot of honeycombs, it is proved that the dough has been fermented well, so the fermented dough is the old fermented noodles.

Cooked Bun Fermentation

To use the cooked bun fermentation method, you need to prepare 3 steamed buns with old leavened dough in advance, and then break these buns into small pieces for spare.

At the same time, prepare a basin, add the required flour to it, and add warm water to mix it into cotton wool, and then add the prepared buns into the flour, and knead it, knead the flour into a dough and then cover it with a clean towel (in winter, it's best to cover it with plastic wrap).

Place the dough in a place where the temperature is above 30 degrees Celsius for fermentation, and let it ferment until it is twice as big as the original size, then the old leavened noodles are ready.